Gallery: Space Photos of the Week: These Galaxy Clusters Are, Like, Crazy Mysterious
<a href="http://www.nasa.gov/image-feature/goddard/2016/hubble-sees-galaxy-hiding-in-the-night-sky">ESA/Hubble & NASA</a>01SPoW-April29-06.jpg
This striking NASA/ESA Hubble Space Telescope image captures the galaxy UGC 477, located just over 110 million light-years away in the constellation of Pisces. UGC 477 is a low surface brightness galaxy. First proposed in 1976 by Mike Disney, the existence of LSB galaxies was confirmed only in 1986 with the discovery of Malin 1. LSB galaxies like UGC 477 are more diffusely distributed than galaxies such as Andromeda and the Milky Way. With surface brightnesses up to 250 times fainter than the night sky, these galaxies can be incredibly difficult to detect.
<a href="http://www.esa.int/Our_Activities/Observing_the_Earth/Copernicus/Sentinel-1/Sentinel-1B_delivers">ESA</a>02SPoW-April29-08.jpg
Sentinel-1B’s first data strip stretches 370 miles from 80°N degrees through the Barents Sea. The image, which shows the Norwegian Svalbard archipelago on the left, was captured on 28 April 2016 at 05:37 GMT – just two hours after the satellite’s radar was switched on. Sentinel-1B lifted off on a Soyuz rocket from Europe’s Spaceport in French Guiana on 25 April at 21:02 GMT. It joins its twin, Sentinel-1A, to provide more ‘radar vision’ for Europe’s environmental Copernicus program.
<a href="http://www.nasa.gov/mission_pages/chandra/russian-doll-galaxy-clusters-reveal-information-about-dark-energy.html">NASA</a>03SPoW-April29-01.jpg
These four galaxy clusters were part of a large survey of over 300 clusters used to investigate dark energy, the mysterious energy that is currently driving the accelerating expansion of the Universe.
<a href="http://www.esa.int/spaceinimages/Images/2016/04/Colourful_Naukluft">ESA</a>04SPoW-April29-09.jpg
The Sentinel-2A satellite takes us over to central western Namibia, an area surrounding the Namib Naukluft Park, in this image taken on 28 January 2016. The National Park includes part of the Namib – the world’s oldest desert – and the Naukluft Mountain range. It is the largest game park in Africa and the fourth largest in the world.
<a href="http://hubblesite.org/newscenter/archive/releases/2016/18/"> NASA, ESA,</a>05SPoW-April29-05.jpg
Makemake is one of several dwarf planets that reside in the frigid outer realm of our solar system called the Kuiper Belt, a "junkyard" of countless icy bodies left over from our solar system's formation. After discovering Makemake in 2005, astronomers had searched several times for a companion orbiting the icy world. Now, the Hubble Space Telescope has uncovered a tiny moon around Makemake that is estimated to be 100 miles wide.
<a href="http://www.nasa.gov/image-feature/ice-scours-the-north-caspian-sea">NASA</a>06SPoW-April29-04.jpg
The Operational Land Imager on NASA's Landsat 8 satellite acquired this large natural-color image showing a view of the Caspian Sea around the Tyuleniy Archipelago.
<a href="http://www.nasa.gov/image-feature/morning-sunglint-over-the-pacific">NASA</a>07SPoW-April29-02.jpg
This Earth observation composite image from the International Space Station captures morning sunglint and low clouds over the central Pacific Ocean. The image was put together at the Johnson Space Center in Houston, from a series of photographs taken by Expedition 47 Commander Jeff Williams on March 25, 2016.
