Showing posts with label Hubble telescope. Show all posts
Showing posts with label Hubble telescope. Show all posts

Thursday, June 10, 2010

Wondering what a white dwarf star looks like? Take a look here...

Following is the image of an ancient white dwarf star in our very own galaxy "Milky Way" captured by the Hubble telescope.

White Dwarfs Amid Sun-Like Stars and Red Stars in Globular Cluster M4
Source: Hubblesite.org

Close Up of Ancient, White Dwarf Stars in the Milky Way Galaxy

Following is adapted from wikipedia:

As the name suggests, the white dwarf, is a small star composed primarily of electron-degenerate matter. It emits thermal energy in the form of a faint glow. They are very dense some with mass comparable to that of the Sun, volume comparable to that of the Earth. The unusual faintness of white dwarfs was first recognized in 1910 by Henry Norris Russell, Edward Charles Pickering, and Williamina Fleming;[3], p. 1 the name white dwarf was coined by Willem Luyten in 1922.[4]
White dwarfs are thought to be the final evolutionary state of all stars whose mass is not high enough to supernova—over 97% of the stars in our galaxy.

 


Thursday, May 20, 2010

The Sun, Atlantis and Hubble - all in one!

The following images are fabulous!


The Sun, The Hubble Telescope and the Atlantis, all captured in one shot!
Silhouette of the space shuttle Atlantis and the Hubble Space Telescope are seen against the giant Sun (in lower left hand corner). A prism used with camera to filter out sunlight made sun appear super yellow.


Zooming in the image, one can see the space shuttle Atlantis just above the Hubble!



Here only Atlantis is cruising along!

In 2009, Atlantis was on one of its space missions to repair the Hubble telescope for the last time. Down here on the earth, an amateur astronomer was set on his mission of photographing objects some 370 miles away, measuring about 13-35m in length, and traveling at 15,000 mph (miles per hour). And, to add to this list of super challenging parameters was the glaring sun!

According to Mr. Theirry Legault's interview posting with the Mail Online
"However, the greatest challenge was to chase a hole in the clouds that were numerous in the area because there are currently many thunderstorms over Florida. I had to take the photo just at the right instant."

Read more: Solar powered: Amateur astronomer snaps space shuttle and telescope speeding across the sun

Wednesday, April 28, 2010

The Helix Nebula aka 'The eye of the God'

This image is called "The eye of God"



This image was possible by composition from NASA's Hubble Space Telescope and the view from National Science Foundation's Mosaic Camera mounted on a 0.9-meter telescope at Kitt Peak National Observatory near Tucson, Ariz. NGC 7293, the Helix Nebula, is one of the closest nebulae of all and is about 450 light years away (exact distance is uncertain). This image is of paramount importance as it holds the clues in future for our very own Sun - happens to a star towards its dying stages. At the center of the image one can spot a white dot a "super-hot white dwarf" star swimming in the sea of hot blue gases.

References: Iridescent Glory of Nearby Planetary Nebula Showcased on Astronomy Day
The Helix Nebula