05-02-2015 04:40 PM CET
europeanspaceagency posted a photo:
This new NASA/ESA Hubble Space Telescope image captures a rare occurrence as three of Jupiter’s largest moons parade across the giant gas planet’s banded face.
The image shows the end of the event. Europa has entered the frame at lower left with slower-moving Callisto above and to the right of it. Meanwhile Io — which orbits significantly closer to Jupiter — is approaching the eastern limb of the planet.
Read more:
sci.esa.int/hubble/55394-
Credit: NASA, ESA, Hubble Heritage Team
This new NASA/ESA Hubble Space Telescope image captures a rare occurrence as three of Jupiter’s largest moons parade across the giant gas planet’s banded face.
The image shows the end of the event. Europa has entered the frame at lower left with slower-moving Callisto above and to the right of it. Meanwhile Io — which orbits significantly closer to Jupiter — is approaching the eastern limb of the planet.
Read more:
sci.esa.int/hubble/55394-
Credit: NASA, ESA, Hubble Heritage Team
05-02-2015 03:49 PM CET
europeanspaceagency posted a photo:
A summary of the almost 14 billion year history of the Universe, showing in particular the events that contributed to the Cosmic Microwave Background, or CMB.
The timeline in the upper part of the illustration shows an artistic view of the evolution of the cosmos on large scales. The processes depicted range from inflation, the brief era of accelerated expansion that the Universe underwent when it was a tiny fraction of a second old, to the release of the CMB, the oldest light in our Universe, imprinted on the sky when the cosmos was just 380 000 years old; and from the ‘Dark Ages’ to the birth of the first stars and galaxies, which reionised the Universe when it was a few hundred million years old, all the way to the present time.
Tiny quantum fluctuations generated during the inflationary epoch are the seeds of future structure: the stars and galaxies of today. After the end of inflation, dark matter particles started to clump around these cosmic seeds, slowly building a cosmic web of structures. Later, after the release of the CMB, normal matter started to fall into these structures, eventually giving rise to stars and galaxies.
The inserts below show a zoomed-in view on some of the microscopic processes taking place during cosmic history: from the tiny fluctuations generated during inflation, to the dense soup of light and particles that filled the early Universe; from the last scattering of light off electrons, which gave rise to the CMB and its polarisation, to the reionisation of the Universe, caused by the first stars and galaxies, which induced additional polarisation on the CMB.
More details:
www.esa.int/Our_Activities/
Credit: ESA
A summary of the almost 14 billion year history of the Universe, showing in particular the events that contributed to the Cosmic Microwave Background, or CMB.
The timeline in the upper part of the illustration shows an artistic view of the evolution of the cosmos on large scales. The processes depicted range from inflation, the brief era of accelerated expansion that the Universe underwent when it was a tiny fraction of a second old, to the release of the CMB, the oldest light in our Universe, imprinted on the sky when the cosmos was just 380 000 years old; and from the ‘Dark Ages’ to the birth of the first stars and galaxies, which reionised the Universe when it was a few hundred million years old, all the way to the present time.
Tiny quantum fluctuations generated during the inflationary epoch are the seeds of future structure: the stars and galaxies of today. After the end of inflation, dark matter particles started to clump around these cosmic seeds, slowly building a cosmic web of structures. Later, after the release of the CMB, normal matter started to fall into these structures, eventually giving rise to stars and galaxies.
The inserts below show a zoomed-in view on some of the microscopic processes taking place during cosmic history: from the tiny fluctuations generated during inflation, to the dense soup of light and particles that filled the early Universe; from the last scattering of light off electrons, which gave rise to the CMB and its polarisation, to the reionisation of the Universe, caused by the first stars and galaxies, which induced additional polarisation on the CMB.
More details:
www.esa.int/Our_Activities/
Credit: ESA
05-02-2015 03:49 PM CET
europeanspaceagency posted a photo:
A visualisation of the polarisation of the Cosmic Microwave Background, or CMB, as detected by ESA’s Planck satellite on a small patch of the sky measuring 20º across.
The CMB is a snapshot of the oldest light in our Universe, imprinted on the sky when the Universe was just 380 000 years old. It shows tiny temperature fluctuations that correspond to regions of slightly different densities, representing the seeds of all future structure: the stars and galaxies of today.
A small fraction of the CMB is polarised – it vibrates in a preferred direction. This is a result of the last encounter of this light with electrons, just before starting its cosmic journey. For this reason, the polarisation of the CMB retains information about the distribution of matter in the early Universe, and its pattern on the sky follows that of the tiny fluctuations observed in the temperature of the CMB.
In this image, the colour scale represents temperature differences in the CMB, while the texture indicates the direction of the polarised light. The patterns seen in the texture are characteristic of ‘E-mode’ polarisation, which is the dominant type for the CMB.
For the sake of illustration, both data sets have been filtered to show mostly the signal detected on scales around 5º on the sky. However, fluctuations in both the CMB temperature and polarisation are present and were observed by Planck also on larger as well as smaller angular scales.
More details:
www.esa.int/Our_Activities/
Credit: ESA and the Planck Collaboration
A visualisation of the polarisation of the Cosmic Microwave Background, or CMB, as detected by ESA’s Planck satellite on a small patch of the sky measuring 20º across.
The CMB is a snapshot of the oldest light in our Universe, imprinted on the sky when the Universe was just 380 000 years old. It shows tiny temperature fluctuations that correspond to regions of slightly different densities, representing the seeds of all future structure: the stars and galaxies of today.
A small fraction of the CMB is polarised – it vibrates in a preferred direction. This is a result of the last encounter of this light with electrons, just before starting its cosmic journey. For this reason, the polarisation of the CMB retains information about the distribution of matter in the early Universe, and its pattern on the sky follows that of the tiny fluctuations observed in the temperature of the CMB.
In this image, the colour scale represents temperature differences in the CMB, while the texture indicates the direction of the polarised light. The patterns seen in the texture are characteristic of ‘E-mode’ polarisation, which is the dominant type for the CMB.
For the sake of illustration, both data sets have been filtered to show mostly the signal detected on scales around 5º on the sky. However, fluctuations in both the CMB temperature and polarisation are present and were observed by Planck also on larger as well as smaller angular scales.
More details:
www.esa.int/Our_Activities/
Credit: ESA and the Planck Collaboration
05-02-2015 03:49 PM CET
europeanspaceagency posted a photo:
A visualisation of the polarisation of the Cosmic Microwave Background, or CMB, as detected by ESA’s Planck satellite on a small patch of the sky measuring 20º across.
The CMB is a snapshot of the oldest light in our Universe, imprinted on the sky when the Universe was just 380 000 years old. It shows tiny temperature fluctuations that correspond to regions of slightly different densities, representing the seeds of all future structure: the stars and galaxies of today.
A small fraction of the CMB is polarised – it vibrates in a preferred direction. This is a result of the last encounter of this light with electrons, just before starting its cosmic journey. For this reason, the polarisation of the CMB retains information about the distribution of matter in the early Universe, and its pattern on the sky follows that of the tiny fluctuations observed in the temperature of the CMB.
In this image, the colour scale represents temperature differences in the CMB, while the texture indicates the direction of the polarised light. The curly textures are characteristic of ‘E-mode’ polarisation, which is the dominant type for the CMB.
In this image, both data sets have been filtered to show mostly the signal detected on scales around 20 arcminutes on the sky. This shows the fine structure of the measurement obtained by Planck, revealing fluctuations in both the CMB temperature and polarisation on very small angular scales.
More details:
www.esa.int/Our_Activities/
Credit: ESA and the Planck Collaboration
A visualisation of the polarisation of the Cosmic Microwave Background, or CMB, as detected by ESA’s Planck satellite on a small patch of the sky measuring 20º across.
The CMB is a snapshot of the oldest light in our Universe, imprinted on the sky when the Universe was just 380 000 years old. It shows tiny temperature fluctuations that correspond to regions of slightly different densities, representing the seeds of all future structure: the stars and galaxies of today.
A small fraction of the CMB is polarised – it vibrates in a preferred direction. This is a result of the last encounter of this light with electrons, just before starting its cosmic journey. For this reason, the polarisation of the CMB retains information about the distribution of matter in the early Universe, and its pattern on the sky follows that of the tiny fluctuations observed in the temperature of the CMB.
In this image, the colour scale represents temperature differences in the CMB, while the texture indicates the direction of the polarised light. The curly textures are characteristic of ‘E-mode’ polarisation, which is the dominant type for the CMB.
In this image, both data sets have been filtered to show mostly the signal detected on scales around 20 arcminutes on the sky. This shows the fine structure of the measurement obtained by Planck, revealing fluctuations in both the CMB temperature and polarisation on very small angular scales.
More details:
www.esa.int/Our_Activities/
Credit: ESA and the Planck Collaboration
05-02-2015 03:49 PM CET
europeanspaceagency posted a photo:
A visualisation of the polarisation of the Cosmic Microwave Background, or CMB, as detected by ESA's Planck satellite over the entire sky.
The CMB is a snapshot of the oldest light in our Universe, imprinted on the sky when the Universe was just 380 000 years old. It shows tiny temperature fluctuations that correspond to regions of slightly different densities, representing the seeds of all future structure: the stars and galaxies of today.
A small fraction of the CMB is polarised – it vibrates in a preferred direction. This is a result of the last encounter of this light with electrons, just before starting its cosmic journey. For this reason, the polarisation of the CMB retains information about the distribution of matter in the early Universe, and its pattern on the sky follows that of the tiny fluctuations observed in the temperature of the CMB.
In this image, the colour scale represents temperature differences in the CMB, while the texture indicates the direction of the polarised light. The patterns seen in the texture are characteristic of ‘E-mode’ polarisation, which is the dominant type for the CMB.
For the sake of illustration, both data sets have been filtered to show mostly the signal detected on scales around 5º on the sky. However, fluctuations in both the CMB temperature and polarisation are present and were observed by Planck on much smaller angular scales, too.
More details:
www.esa.int/Our_Activities/
Credit: ESA and the Planck Collaboration
A visualisation of the polarisation of the Cosmic Microwave Background, or CMB, as detected by ESA's Planck satellite over the entire sky.
The CMB is a snapshot of the oldest light in our Universe, imprinted on the sky when the Universe was just 380 000 years old. It shows tiny temperature fluctuations that correspond to regions of slightly different densities, representing the seeds of all future structure: the stars and galaxies of today.
A small fraction of the CMB is polarised – it vibrates in a preferred direction. This is a result of the last encounter of this light with electrons, just before starting its cosmic journey. For this reason, the polarisation of the CMB retains information about the distribution of matter in the early Universe, and its pattern on the sky follows that of the tiny fluctuations observed in the temperature of the CMB.
In this image, the colour scale represents temperature differences in the CMB, while the texture indicates the direction of the polarised light. The patterns seen in the texture are characteristic of ‘E-mode’ polarisation, which is the dominant type for the CMB.
For the sake of illustration, both data sets have been filtered to show mostly the signal detected on scales around 5º on the sky. However, fluctuations in both the CMB temperature and polarisation are present and were observed by Planck on much smaller angular scales, too.
More details:
www.esa.int/Our_Activities/
Credit: ESA and the Planck Collaboration
05-02-2015 10:56 AM CET
europeanspaceagency posted a photo:
![Comet 67P on 26 January - NAVCAM [a]](https://blogger.googleusercontent.com/img/proxy/AVvXsEiunEKQkzBrqpzvwnf9w4ipWaHsbe6tE1nYS2k7qBMvWhFCXMf9mRD4O7OkGrMpkPdgeDud_iPge8E3pG6dafw6hyFXQBxPujBcWGUk5LXEk4n-aC2BHXTKltD3Kpj914VJ4LaVBirL4syaxUMUbJ-SyCseyFtyvlErngVGNdjj=s0-d-e1-ft)
One of four NAVCAM mosaic images of Comet 67P/Churyumov-Gerasimenko, taken on 26 January 2015 when Rosetta was at a distance of 27.7 km from the centre of the comet. Each 1024 x 1024 frame measures about 2.4 km across. More information and the four individual images making up the montage are available via the blog:Around Aten - CometWatch 26 January.
Credit: ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0
This work is licenced under the Creative Commons Attribution-ShareAlike 3.0 IGO (CC BY-SA 3.0 IGO) licence. The user is allowed to reproduce, distribute, adapt, translate and publicly perform this publication, without explicit permission, provided that the content is accompanied by an acknowledgement that the source is credited as 'European Space Agency – ESA', a direct link to the licence text is provided and that it is clearly indicated if changes were made to the original content. Adaptation/translation/
One of four NAVCAM mosaic images of Comet 67P/Churyumov-Gerasimenko, taken on 26 January 2015 when Rosetta was at a distance of 27.7 km from the centre of the comet. Each 1024 x 1024 frame measures about 2.4 km across. More information and the four individual images making up the montage are available via the blog:Around Aten - CometWatch 26 January.
Credit: ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0
This work is licenced under the Creative Commons Attribution-ShareAlike 3.0 IGO (CC BY-SA 3.0 IGO) licence. The user is allowed to reproduce, distribute, adapt, translate and publicly perform this publication, without explicit permission, provided that the content is accompanied by an acknowledgement that the source is credited as 'European Space Agency – ESA', a direct link to the licence text is provided and that it is clearly indicated if changes were made to the original content. Adaptation/translation/
05-02-2015 10:56 AM CET
europeanspaceagency posted a photo:
![Comet 67P on 26 January - NAVCAM [b]](https://blogger.googleusercontent.com/img/proxy/AVvXsEj0P2JqRdXW4-Dwvmf3oD_4fEQ6fLogpImmZxvkBp6ASjuDPGllyx0wqjlM_eI9C9Y55qS0yLvmEu3PYkNKWP9vm_51c7hyyf_hphcBCV5OuxI8ET_xMPD8X5Lnj9mADZDHbP1gNfT-4LKMDFZluIIjEpcGRi5eaCl2PrQTQ8fn=s0-d-e1-ft)
One of four NAVCAM mosaic images of Comet 67P/Churyumov-Gerasimenko, taken on 26 January 2015 when Rosetta was at a distance of 27.7 km from the centre of the comet. Each 1024 x 1024 frame measures about 2.4 km across. More information and the four individual images making up the montage are available via the blog:Around Aten - CometWatch 26 January.
Credit: ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0
This work is licenced under the Creative Commons Attribution-ShareAlike 3.0 IGO (CC BY-SA 3.0 IGO) licence. The user is allowed to reproduce, distribute, adapt, translate and publicly perform this publication, without explicit permission, provided that the content is accompanied by an acknowledgement that the source is credited as 'European Space Agency – ESA', a direct link to the licence text is provided and that it is clearly indicated if changes were made to the original content. Adaptation/translation/
One of four NAVCAM mosaic images of Comet 67P/Churyumov-Gerasimenko, taken on 26 January 2015 when Rosetta was at a distance of 27.7 km from the centre of the comet. Each 1024 x 1024 frame measures about 2.4 km across. More information and the four individual images making up the montage are available via the blog:Around Aten - CometWatch 26 January.
Credit: ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0
This work is licenced under the Creative Commons Attribution-ShareAlike 3.0 IGO (CC BY-SA 3.0 IGO) licence. The user is allowed to reproduce, distribute, adapt, translate and publicly perform this publication, without explicit permission, provided that the content is accompanied by an acknowledgement that the source is credited as 'European Space Agency – ESA', a direct link to the licence text is provided and that it is clearly indicated if changes were made to the original content. Adaptation/translation/
05-02-2015 10:55 AM CET
europeanspaceagency posted a photo:
![Comet 67P on 26 January - NAVCAM [c]](https://blogger.googleusercontent.com/img/proxy/AVvXsEgVdGZlbYEu4OR0_NCCiJqJh68NHew_Igyw3kiWSoYFVzV6RFlCtEtBo2F5EGBU5mRpGQvgVxnhWZ0PusHQqc_7fRVWkms4nxI3xhbHypP1V4lt6OATa5CDL_FkB0NkGoaxHWZWvTnEPoI08HWXwgjXbEET7utE3RJy0FPkTx4j=s0-d-e1-ft)
One of four NAVCAM mosaic images of Comet 67P/Churyumov-Gerasimenko, taken on 26 January 2015 when Rosetta was at a distance of 27.7 km from the centre of the comet. Each 1024 x 1024 frame measures about 2.4 km across. More information and the four individual images making up the montage are available via the blog:Around Aten - CometWatch 26 January.
Credit: ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0
This work is licenced under the Creative Commons Attribution-ShareAlike 3.0 IGO (CC BY-SA 3.0 IGO) licence. The user is allowed to reproduce, distribute, adapt, translate and publicly perform this publication, without explicit permission, provided that the content is accompanied by an acknowledgement that the source is credited as 'European Space Agency – ESA', a direct link to the licence text is provided and that it is clearly indicated if changes were made to the original content. Adaptation/translation/
One of four NAVCAM mosaic images of Comet 67P/Churyumov-Gerasimenko, taken on 26 January 2015 when Rosetta was at a distance of 27.7 km from the centre of the comet. Each 1024 x 1024 frame measures about 2.4 km across. More information and the four individual images making up the montage are available via the blog:Around Aten - CometWatch 26 January.
Credit: ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0
This work is licenced under the Creative Commons Attribution-ShareAlike 3.0 IGO (CC BY-SA 3.0 IGO) licence. The user is allowed to reproduce, distribute, adapt, translate and publicly perform this publication, without explicit permission, provided that the content is accompanied by an acknowledgement that the source is credited as 'European Space Agency – ESA', a direct link to the licence text is provided and that it is clearly indicated if changes were made to the original content. Adaptation/translation/
05-02-2015 10:55 AM CET
europeanspaceagency posted a photo:
![Comet 67P on 26 January - NAVCAM [d]](https://blogger.googleusercontent.com/img/proxy/AVvXsEiwvueVuz3WGgChF6ZHwbkky6aj03QPFkP-MQWqwO-oONZMt1EhERDzaBBrihZTjqDuymSSG0e3Y_yHNpYHO9f54JENBYwLD2neCSKm1iFxsALFpxUkC1O_rHkkPmjQRGgfs2WJV-92R7PgBQszDSdyt34IiNQG5j8XnJ95OJQL=s0-d-e1-ft)
One of four NAVCAM mosaic images of Comet 67P/Churyumov-Gerasimenko, taken on 26 January 2015 when Rosetta was at a distance of 27.7 km from the centre of the comet. Each 1024 x 1024 frame measures about 2.4 km across. More information and the four individual images making up the montage are available via the blog:Around Aten - CometWatch 26 January.
Credit: ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0
This work is licenced under the Creative Commons Attribution-ShareAlike 3.0 IGO (CC BY-SA 3.0 IGO) licence. The user is allowed to reproduce, distribute, adapt, translate and publicly perform this publication, without explicit permission, provided that the content is accompanied by an acknowledgement that the source is credited as 'European Space Agency – ESA', a direct link to the licence text is provided and that it is clearly indicated if changes were made to the original content. Adaptation/translation/
One of four NAVCAM mosaic images of Comet 67P/Churyumov-Gerasimenko, taken on 26 January 2015 when Rosetta was at a distance of 27.7 km from the centre of the comet. Each 1024 x 1024 frame measures about 2.4 km across. More information and the four individual images making up the montage are available via the blog:Around Aten - CometWatch 26 January.
Credit: ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0
This work is licenced under the Creative Commons Attribution-ShareAlike 3.0 IGO (CC BY-SA 3.0 IGO) licence. The user is allowed to reproduce, distribute, adapt, translate and publicly perform this publication, without explicit permission, provided that the content is accompanied by an acknowledgement that the source is credited as 'European Space Agency – ESA', a direct link to the licence text is provided and that it is clearly indicated if changes were made to the original content. Adaptation/translation/
05-02-2015 10:55 AM CET
europeanspaceagency posted a photo:
This four-image montage comprises Rosetta navigation camera images taken from a distance of 27.7 km from the centre of Comet 67P/Churyumov-Gerasimenko on 26 January. The image resolution is 2.4 m/pixel and the individual 1024 x 1024 frames measure about 2.4 km across.
More information and the four individual images making up the montage are available via the blog: Around Aten - CometWatch 26 January.
Credit: ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0
This work is licenced under the Creative Commons Attribution-ShareAlike 3.0 IGO (CC BY-SA 3.0 IGO) licence. The user is allowed to reproduce, distribute, adapt, translate and publicly perform this publication, without explicit permission, provided that the content is accompanied by an acknowledgement that the source is credited as 'European Space Agency – ESA', a direct link to the licence text is provided and that it is clearly indicated if changes were made to the original content. Adaptation/translation/
This four-image montage comprises Rosetta navigation camera images taken from a distance of 27.7 km from the centre of Comet 67P/Churyumov-Gerasimenko on 26 January. The image resolution is 2.4 m/pixel and the individual 1024 x 1024 frames measure about 2.4 km across.
More information and the four individual images making up the montage are available via the blog: Around Aten - CometWatch 26 January.
Credit: ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0
This work is licenced under the Creative Commons Attribution-ShareAlike 3.0 IGO (CC BY-SA 3.0 IGO) licence. The user is allowed to reproduce, distribute, adapt, translate and publicly perform this publication, without explicit permission, provided that the content is accompanied by an acknowledgement that the source is credited as 'European Space Agency – ESA', a direct link to the licence text is provided and that it is clearly indicated if changes were made to the original content. Adaptation/translation/
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