Hubble’s 25th Birthday
The Hubble Space Telescope has expanded our knowledge of the universe by leaps and bounds in just 25 …
Space Exploration
MESSENGER’s last messages
Before crashing into Mercury’s surface, the MESSENGER spacecraft will capture high-resolution images …
The Jupiter Effect
The planet Jupiter may be responsible for Earth’s mild climate.
Waving to Aliens
Is it time to actively signal civilizations that might exist beyond earth?
Naming Mercury’s Craters
Planetary geologists provide the public with a chance to name five craters on Mercury.
Space Elevator
Could a “space elevator” carry supplies to the International Space Station?
Earth’s Ancient Water
The earth’s water is older than the sun’s and may point to the possibility of life in other parts of …
Comet Harpoon
NASA scientists are testing a harpoon that could bring back samples from comets.
Far-Out Mega Planet
An enormous planet, orbiting a star at a tremendous distance, challenges theories of planet …
Space Elevator
Could a “space elevator” carry supplies to the International Space Station?
