June 21, 2012
"All 786 known planets (as of June 2012) to scale (some planet sizes estimated based on mass). This [small box] is our solar system. The rest of these orbit other stars and were only discovered recently. Most of them are huge because those are the kind we learned to detect first, but now we’re finding that small ones are actually more common. We know nothing about what’s on any of them. With better telescopes, that would change. This is an exciting time.”
(http://xkcd.com/1071/large/)

"All 786 known planets (as of June 2012) to scale (some planet sizes estimated based on mass). This [small box] is our solar system. The rest of these orbit other stars and were only discovered recently. Most of them are huge because those are the kind we learned to detect first, but now we’re finding that small ones are actually more common. We know nothing about what’s on any of them. With better telescopes, that would change. This is an exciting time.

(http://xkcd.com/1071/large/)

September 7, 2011
saturn would float in water

saturn would float in water

September 1, 2011

A large rock nicknamed Ridout dominates the rim of Odyssey crater—itself on the rim of the much larger Endeavour crater—in an August 13 picture by theMars rover Opportunity. The shot is among the first pictures taken by the rover since it arrived at Endeavour on August 9.
Ridout is thought to be a piece of material ejected from Odyssey during the impact that formed the comparatively small basin. The rock is 4.9 feet (1.5 meters) long—roughly the same size as Opportunity.

A large rock nicknamed Ridout dominates the rim of Odyssey crater—itself on the rim of the much larger Endeavour crater—in an August 13 picture by theMars rover Opportunity. The shot is among the first pictures taken by the rover since it arrived at Endeavour on August 9.

Ridout is thought to be a piece of material ejected from Odyssey during the impact that formed the comparatively small basin. The rock is 4.9 feet (1.5 meters) long—roughly the same size as Opportunity.

August 31, 2011

Sunlight casts a crescent shadow on the floor of an underground cavern in a recently released picture of a Martian “skylight.” This round opening likely leads to a lava tube, which is created when lava solidifies on the surface but keeps flowing underground. Eventually the lava drains away, leaving an empty cave.
Snapped by NASA’s Mars Reconnaissance Orbiter, the picture revealed that the skylight is 115 feet (35 meters) across. The shadow helped scientists calculate that the cave floor is about 65 feet (20 meters) below the surface.

Sunlight casts a crescent shadow on the floor of an underground cavern in a recently released picture of a Martian “skylight.” This round opening likely leads to a lava tube, which is created when lava solidifies on the surface but keeps flowing underground. Eventually the lava drains away, leaving an empty cave.

Snapped by NASA’s Mars Reconnaissance Orbiter, the picture revealed that the skylight is 115 feet (35 meters) across. The shadow helped scientists calculate that the cave floor is about 65 feet (20 meters) below the surface.

4:48am
  
Filed under: mars lava cave space astronomy planet science 
August 28, 2011

Dark shadows help define craters on the face of the large asteroid Vesta, named for the Roman virgin goddess of hearth and home, in a picture released August 22.
NASA’s Dawn spacecraft snapped the shot from the satellite’s orbit around Vesta. The space rock is part of our solar system’s main asteroid belt, between the orbits of Mars and Jupiter. The massive asteroid is considered a protoplanet, a would-be planet whose growth was interrupted in infancy by the formation of Jupiter.

Dark shadows help define craters on the face of the large asteroid Vesta, named for the Roman virgin goddess of hearth and home, in a picture released August 22.

NASA’s Dawn spacecraft snapped the shot from the satellite’s orbit around Vesta. The space rock is part of our solar system’s main asteroid belt, between the orbits of Mars and Jupiter. The massive asteroid is considered a protoplanet, a would-be planet whose growth was interrupted in infancy by the formation of Jupiter.

April 22, 2011
happy earth day, kids!

happy earth day, kids!

March 10, 2011
ultraviolet image of saturn’s rings

ultraviolet image of saturn’s rings

7:35pm
  
Filed under: science astronomy saturn space planet 
March 9, 2011
venus

venus

2:26am
  
Filed under: science astronomy planet space venus