2015년 2월 13일 금요일

European Space Agency Flickr Update

13-02-2015 03:37 PM CET

europeanspaceagency posted a photo:
Comet 67P on 9 February 2015 - NAVCAM
This single frame Rosetta navigation camera image was taken from a distance of 105 km from the centre of Comet 67P/Churyumov-Gerasimenko on 9 February 2015. The image has a resolution of 8.9 m/pixel and the crop shown here measures 9.1 km across. The image is processed to bring out the details of the comet's activity.

More information and the original image is available via the blog Last stop before close flyby – CometWatch 9 February.

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/derivatives must be distributed under the same licence terms as this publication. To view a copy of this license, please visit creativecommons.org/licenses/by-sa/3.0/igo/
13-02-2015 01:50 PM CET

europeanspaceagency posted a photo:
Heart of Voh, New Caledonia
Mangrove swamps along the coast of New Caledonia in the southwest Pacific Ocean are pictured in this false-colour satellite image. The heart-shaped formation – known as the ‘Heart of Voh’ for its proximity to the Voh commune – is a natural structure caused by changes in vegetation cover. This image was captured by the Korea Aerospace Research Institute’s Kompsat-2 satellite on 1 April 2009.
13-02-2015 10:34 AM CET

europeanspaceagency posted a photo:
Las Vegas and Lake Mead
This image from the Landsat-8 satellite acquired on 23 September 2014 brings us over the southwest United States: Nevada and Arizona.

Las Vegas with its grid-like urban plan is visible near the centre. Sitting in a basin of the Mojave Desert, the city is surrounded by a number of mountain ranges.

Zooming in southeast of the city we can see large, dark shapes in one of the desert valleys. These are solar panels of a large-scale plant called Nevada Solar One. The plant harnesses enough energy to power an estimated 14 000 homes a year.

Satellites can assist in the selection of sites of solar power plants by providing sunshine maps that combine information on overall solar irradiance and average cloudiness. Along with other space-derived products such as digital elevation models, this can help sustainable energy companies pinpoint areas best suited for exploiting solar energy.

The large dark area pictured is Lake Mead, the largest reservoir in the country. It primary source is the Colorado River, flowing in from the east and out to the south.

This massive reservoir was established in the early 1930s by the construction of the Hoover Dam on the Colorado River. Drought and increased water demand in recent years have resulted in a decline in water levels, hitting record lows last summer.

The lake and surrounding area form the Lake Mead National Recreation Area, where visitors can go boating, swimming, fishing, hiking, biking and camping.

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

Credit: USGS/ESA

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