Huge waves are sculpted in this two-lobed nebula some 3000 light-years away in the constellation of Sagittarius. This warm planetary nebula harbors one of the hottest stars known and its powerful stellar winds generate waves 100 billion kilometres high. The waves are caused by supersonic shocks, formed when the local gas is compressed and heated in front of the rapidly expanding lobes. The atoms caught in the shock emit the spectacular radiation seen in this image.
Hubble’s newest camera has taken an image of galaxy NGC 4214. This galaxy glows brightly with young stars and gas clouds, and is an ideal laboratory to research star formation and evolution.
Size isn’t everything… in astronomy, at least. Dwarf galaxy NGC 4214 may be small, but what it lacks in size it makes up for in content. It is packed with everything an astronomer could ask for, from hot, young star-forming regions to old clusters with red supergiants.
The intricate patterns of glowing ionised hydrogen gas, cavities blown clear of gas by stellar wind, and bright stellar clusters of NGC 4214 can be seen in this optical and near-infrared image, taken using the Wide Field Camera 3 (WFC3) instrument on the NASA/ESA Hubble Space Telescope.
A huge heart-shaped cavity — possibly the galaxy’s most eye-catching feature — can be seen at the centre of the image. Inside this hole lies a large cluster of massive, young stars ranging in temperature from 10 000 to 50 000 degrees Celsius. Their strong stellar winds are responsible for the creation of this hollow area. The resulting lack of gas prevents any further star formation from occurring in this region.
Located around 10 million light-years away in the constellation of Canes Venatici (The Hunting Dogs), the galaxy’s relative close proximity to us, combined with the wide variety of evolutionary stages among the stars, makes it an ideal laboratory to research what triggers star formation and evolution. By chance, there is relatively little interstellar dust between us and NGC 4214, making our measurements of it more accurate.
NGC 4214 contains a large amount of gas, some of which can be seen glowing red in the image, providing abundant material for star formation. The area with the most hydrogen gas, and consequently, the youngest clusters of stars (around two million years old), lies in the upper part of this Hubble image. Like most of the features in the image, this area is visible due to ionisation of the surrounding gas by the ultraviolet light of a young cluster of stars within.
Observations of this dwarf galaxy have also revealed clusters of much older red supergiant stars that we see at a late stage in their evolution. Additional older stars can be seen dotted all across the galaxy. While these are dominant in infrared emission they can only be seen shining faintly in this visible-light image. The variety of stars at different stages in their evolution, indicate that the recent and ongoing starburst periods are by no means the first, and the galaxy’s numerous ionised hydrogen regions suggest they will not be the last.
This image is of Atlantis and its Orbital Boom Sensor System robot arm extension backdropped against Earth’s horizon and a greenish phenomenon associated with Aurora Australis. One of the station’s solar array panels appears at upper left. Because of the exposure time needed for this type of photography, some of the stars in the background are blurred.
Absolutely stunning photograph of Atlantis’ Final Flight launch
Space shuttle Atlantis is seen as it lifts off from NASA Kennedy Space Center’s Launch Pad 39A at 11:29 a.m. EDT.
The launch of Atlantis on the STS-135 mission, is the final flight of the Shuttle Program.
Sometimes we take wildlife pictures that we see in books and magazines for granted; seldom does it give you the impressions that they were taken easily. The truth is, photographing animals (especially in wildlife) is very involved, such a moment could only be told through some timely amazing shots. For someone who loves animals, photographing them can be both very fulfilling and frustrating at the same time. Excellent animal photography requires experience, knowledge and patience.
Animals can make very eye catching subjects to photograph in wild. Taking wildlife photography in a place where the animals don’t fear humans makes your task a bit difficult. In their natural environment, animals often provide many opportunities for taking dramatic shots. Let’s now take a look at some of these dramatic images of animal photography to see emotions in the wild nature.
This image of a pair of interacting galaxies called Arp 273 was released to celebrate the 21st anniversary of the launch of the NASA/ESA Hubble Space Telescope.
The distorted shape of the larger of the two galaxies shows signs of tidal interactions with the smaller of the two. It is thought that the smaller galaxy has actually passed through the larger one.
A Lunar Eclipse on Solstice Day
Credit & Copyright: Jerry Lodriguss
(Catching the Light)