WELCOME TO THE FIRST of our weekly collections of the best astronomy and space exploration images taken by observatories around the world and in space. Each week we’ll bring you a selection of our favourite recent images – if you like them (and we hope you do), please share them with your friends. And don’t forget you can elect to have this and other stories emailed direct to your inbox, just by signing up to our free email service – see the Subscribe box in the column at right.
So, let’s get started on this week’s images.
1. The Orion Nebula
One of the most famous sights in the sky, the Orion Nebula is a huge cloud of gas and dust about 1,500 light-years from Earth. Astronomers call it a ‘stellar nursery’ because many stars have been born, or are in the process of being born, out of all that gas and dust. See all the tiny red dots? Those are newly born stars. This false-colour image was taken by NASA’s Spitzer Space Telescope, which views the universe at infrared wavelengths. Courtesy NASA.
2. The Coma Cluster
Galaxies tend to clump together in groups, or clusters. Some clusters comprise only a handful of galaxies, others have more than a thousand. The Coma Cluster – so-called because it is seen in the direction of the constellation Coma Berenices, which means ‘Berenice’s Hair’ (named after an ancient Egyptian queen) – is located about 350 million light years from Earth. Most of its 1,000-plus galaxies are elliptical (one of the two main galaxy shapes, the other being spiral). Pretty much all of the dots and blobs of light you can see in this Hubble Space Telescope image are galaxies; the three main ones are called IC 4041 (left), IC 4042 (middle) and GP 236 (right). The Coma Cluster is itself part of a larger grouping that also contains the Leo Cluster, and is called the Coma Supercluster. Courtesy ESA / Hubble & NASA; D. Carter (LJMU).
3. The Topsy Turvy galaxy
The Topsy Turvy galaxy (also known by its catalogue number, NGC 1313) is located about 13 million light years from Earth. Hidden within it are two black holes, whose presence is given away – where the purple patches are (false colour) – by energetic X-rays coming from gas being siphoned from companion stars. The X-ray data comes from NASA’s NuSTAR space telescope, while the background image is from the Digitised Sky Survey (made from pictures taken by ground-based telescopes). Courtesy NASA / JPL-Caltech / IRAP.
4. Planets in the dust
Japanese astronomers have been studying a star called HD 142527, about 450 light years Earth. HD 142527 is a young star, surrounded by a huge, slightly lop-sided ring of gas and dust. The astronomers say that a dense spot in the ring is where planets could be forming. (Due to the wavelength used, the star is not visible in this image.) Courtesy ALMA (ESO/NAOJ/NRAO), NAOJ.
5. The Tarantula Nebula
The Tarantula Nebula is a huge cloud of gas and dust in the Large Magellanic Cloud, a neighbouring galaxy to our Milky Way. This Hubble Space Telescope infrared view shows cloudy whisps and many thousands of sparkling stars. Just to the left of centre is a tight group of stars known as R136. In early photographs, R136 seemed to be a single, giant star, and no one could work out how a star could grow to be so big. But eventually better imaging revealed it to be a cluster of stars – so many and so bright, that the light the emit is the main reason why the Tarantula’s gas and dust is all lit up. Courtesy NASA, ESA, E. Sabbi (STScI).
6. Looking down on Venus
This black and white image of Venus was taken by the European Space Agency’s Venus Express spacecraft, which has been orbiting the planet since April 2006. The viewpoint is looking down on the south pole from an altitude of 50,000 kilometres. Venus is perpetually covered by thick clouds, but Venus Express’ instruments can pick out bands within those clouds, which are being blown by the prevailing winds from east to west (the opposite to winds here on Earth). The small black blobs are not real; they are artefacts of the imaging equipment. Courtesy ESA / MPS / DLR / IDA.
7. Rima Marius
Rima Marius is a lunar ‘rille’ or channel. Such channels are thought to form when a tunnel through which lava once flowed, collapses in on itself. Rima Marius is 280 kilometres long, winding its way across a flat plain known as the Oceanus Procellarum, or Ocean of Storms. This image was taken by NASA’s Lunar Reconnaissance Orbiter spacecraft. Courtesy NASA / GSFC / Arizona State University.
8. Tracks on Mars
NASA’s Mars Reconnaissance Orbiter snapped this image of the martian surface on December 11, 2013. It clearly shows the tracks left by the Curiosity rover as it slowly makes it way across the floor of Gale Crater (the rover itself is out of frame). The rover has six wheels, three on each side; the distance between left and right wheels is about 3 metres. See if you can follow the tracks all the way from top right to bottom left. Courtesy NASA / JPL-Caltech / Univ. of Arizona.
9. Shadows on Saturn
Shadows cast by Saturn’s rings make the planet look like it has been painted with Indian ink while spinning on a potter’s wheel. The rings themselves are out of view in this image, taken by NASA’s Cassini spacecraft, which has been orbiting Saturn since 2004. Courtesy NASA / JPL-Caltech / Space Science Institute.
10. Docking at the Station
Orbital Sciences Corporation’s Cygnus commercial cargo spacecraft is seen docked to the Harmony module of the International Space Station. Attached is the Station’s robot arm, called Canadarm2 (being the second generation of robot arm supplied by Canada). The Cygnus craft was launched aboard an Antares rocket on January 9. Courtesy NASA.
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