A Quote by Sir Martin Rees, Astronomer Royal of Great Britain



Telescopes are in some ways like time machines...
They reveal galaxies so far away that their light has taken billions of years to reach us. We in astronomy have an advantage in studying the universe, in that we can actually see the past. We owe our existence to stars, because they make the atoms of which we are formed. So if you are romantic you can say we are literally starstuff. If you're less romantic you can say we're the nuclear waste from the fuel that makes stars shine. We've made so many advances in our understanding. A few centuries ago, the pioneer navigators learnt the size and shape of our Earth, and the layout of the continents. We are now just learning the dimensions and ingredients of our entire cosmoc, and can at last make some sense of our cosmic habitat.



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Monday, April 6, 2009

Cassinis flyby images and videos




Though I expected better pictures of Saturn, looking at these pictures and the videos was exciting too. I guess I was expecting a little too much :)


The new flyover maps show, for the first time, the 3-D topography and height of the 1,200-meter (4,000-foot) mountain tops, the north polar lake country, the vast dunes more than 100 meters (300 feet) high that crisscross the moon, and the thick flows that may have oozed from possible ice volcanoes.

Here are the links to the Videos of the 3-D terrain.



Source: jpl.nasa.org

Thursday, April 2, 2009

Cassinis Equinox Mission (Flyby - 19 hrs from now)


Cassini is another NASA mission and it completed its initial four-year’s of exploring the Saturn System. Now, the healthy spacecraft is working overtime on the Cassini Equinox Mission, seeking answer to new questions raised in Cassini’s first years at Saturn. It initially observed the southern hemisphere of Saturn and now its set to observe the Northen side. In August 2009 when the sun will shine directly on the equator and then begin to illuminate the northern hemisphere and the rings’ northern face, Cassini will observe seasonal changes brought by the changing Suns angle on Saturn, its Rings and its Moons, which were illuminated from the south during the mission’s first four years.

Many repeat visits(flybys) are planned for Cassini at the moons Titan and Enceladus – both important targets of the Equinox Mission. Cassinis next encounter with Titan is in about 19 hrs from now. Looking forward for a few Titan pictures!


Courtesy: jpl.nasa.gov