2015년 3월 7일 토요일

European Space Agency Flickr Update

06-03-2015 04:50 PM CET

europeanspaceagency posted a photo:
Comet 67P on 28 February 2015 - NAVCAM
This single frame Rosetta navigation camera image was taken from a distance of 102.6 km from the centre of Comet 67P/Churyumov-Gerasimenko on 28 February 2015. The 1024 x 1024 pixel image frame has a resolution of 8.7 m/pixel and measures 9.0 km across. The image is processed to bring out the details of the comet's activity.

More information and the original image via the blog: CometWatch: 28 February.

Credits: 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 'ESA - European Space Agency’, 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/derivatives must be distributed under the same licence terms as this publication. The user must not give any suggestion that ESA necessarily endorses the modifications that you have made. No warranties are given. The license may not give you all of the permissions necessary for your intended use. For example, other rights such as publicity, privacy, or moral rights may limit how you use the material. Any of the above conditions can be waived if you get permission from ESA. To view a copy of this license, please visit creativecommons.org/licenses/by-sa/3.0/igo/
06-03-2015 10:09 AM CET

europeanspaceagency posted a photo:
Hungary
This image of Hungary, with the political border in white, is a mosaic of 11 scans by Sentinel-1A’s radar from October to December 2014.

The scans were recorded in ‘dual polarisation’ horizontal and vertical radar pulses, from which the artificial colour composite was generated.

The majority of the landlocked country has an elevation lower than 300 m above sea level, but there are also a number of mountain ranges. The Great Hungarian Plain dominates the south and east of the country. Above it lies the North Hungarian Mountains region – the mountains appearing brownish in colour in this image, although they would appear green to the eye.

To the west lie the Transdanubian Mountains, and the Transdanubian Hills south of these.

Lake Balaton is seen in the west of the country. With a surface area of about 590 sq km, it is mainly fed by the Zala River at its western end. The lakewater flows out near the eastern end via an artificial channel called the Sió, which eventually feeds into the Danube River – which we can clearly see running north to south through the country.

The capital, Budapest, is visible along the Danube as a cluster of bright radar reflections. Located at the centre of the Carpathian Basin, the city boasts multiple thermal springs, earning it the nickname ‘City of Spas’.

On 24 February, Hungary signed the Accession Agreement to the ESA Convention. Following the conclusion of the ratification process by the Hungarian Government and once the ratification instrument is deposited with the Government of France, Hungary will become the 22nd ESA Member State.

To mark the signing of the Accession Agreement, ESA has recently launched the Hungarian language webpage.

This image is featured on the Earth from Space video programme.

Credit: Copernicus data/ESA (2014)
05-03-2015 09:56 PM CET

europeanspaceagency posted a photo:
Galaxy cluster MACS j1149.5+223 and a supernova four times over
This image shows the huge galaxy cluster MACS J1149+2223, whose light took over 5 billion years to reach us. The huge mass of the cluster and one of the galaxies within it is bending the light from a supernova behind them and creating four separate images of it. The light has been magnified and distorted due to gravitational lensing and as a result the images are arranged around the elliptical galaxy in a formation known as an Einstein cross. A close-up of the Einstein cross is shown in the inset.

Credit: NASA, ESA, S. Rodney (John Hopkins University, USA) and the FrontierSN team; T. Treu (University of California Los Angeles, USA), P. Kelly (University of California Berkeley, USA) and the GLASS team; J. Lotz (STScI) and the Frontier Fields team; M. Postman (STScI) and the CLASH team; and Z. Levay (STScI)
05-03-2015 09:40 PM CET

europeanspaceagency posted a photo:
Four supernova images in an Einstein cross
This image shows four different images of the same supernova whose light has been distorted and magnified by the huge galaxy cluster MACS J1149+2223 in front of it. The huge mass of the cluster and one of the galaxies within it is bending the light from a supernova behind them and creating four separate images of the supernova. The light has been magnified and distorted due to gravitational lensing and as a result the images are arranged around the elliptical galaxy in a formation known as an Einstein cross.

Credit: NASA, ESA, S. Rodney (John Hopkins University, USA) and the FrontierSN team; T. Treu (University of California Los Angeles, USA), P. Kelly (University of California Berkeley, USA) and the GLASS team; J. Lotz (STScI) and the Frontier Fields team; M. Postman (STScI) and the CLASH team; and Z. Levay (STScI)
05-03-2015 09:38 PM CET

europeanspaceagency posted a photo:
Galaxy cluster MACS j1149.5+223
This image shows the huge galaxy cluster MACS J1149.5+223, whose light took over 5 billion years to reach us. The huge mass of the cluster and one of the galaxies within it is bending the light from a supernova behind them and creating four separate images of the supernova, shown clearly in this annotated image. The light has been magnified and distorted due to gravitational lensing and as a result the images are arranged around the elliptical galaxy in a formation known as an Einstein cross.

Read more:
sci.esa.int/hubble/55529-an-explosive-quartet-hubble-sees...

Credit: NASA, ESA, S. Rodney (John Hopkins University, USA) and the FrontierSN team; T. Treu (University of California Los Angeles, USA), P. Kelly (University of California Berkeley, USA) and the GLASS team; J. Lotz (STScI) and the Frontier Fields team; M. Postman (STScI) and the CLASH team; and Z. Levay (STScI)

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