Astronomy Picture Of the Day (APOD)The Cracked Ice Plains of Europa
What caused the cracks in this giant ice-ball? Jupiter's moon Europa has smoothest surface in the solar system and is composed mostly of cracked water-ice. In the above false-colored picture released last week...
Orionids Meteor Shower to Peak Tonight
Tonight you might be able to see Halley's Comet again - or at least some pieces of it. It is widely thought that that the meteors from the Orionids meteor shower, which peaks tonight, are just small pieces of Halley's Comet falling to Earth.
"Safe!" -- In September 1967 (during regular season play), while making a successful soft landing on the Moon's Mare Tranquillitatis, the Surveyor 5 lander actually slid several feet. Equipped with television cameras and some...
Lalande 21185: The Nearest Planetary System?
What's the closest extrasolar planetary system? It may well be planets of the dim red dwarf star cataloged as Lalande 21185 -- a mere 8 light years distant. This star is too faint to be seen by the naked eye and its planets have not been imaged directly.
Auroras are especially large on Jupiter. In pictures released yesterday, the Hubble Space Telescope imaged these unusual light displays in more detail than ever before. Jupiter's auroras are linked to its volcanic moon Io.
Proplyds: Infant Solar Systems?
Are planets common in our galaxy? Strong evidence that the answer is "yes" was provided in this 1994 image made by the Hubble Space Telescope . A close-up of the Orion Nebulae, it reveals what seem to be disks of dust and gas surrounding newly formed stars.
SN 1006: Pieces of the Cosmic Ray Puzzle
Research balloon flights conducted in 1912 by Austrian physicist Victor Hess revealed that the Earth was constantly bombarded by high energy radiation from space - which came to be called "Cosmic Rays". What are Cosmic Rays and where do they come from?
Phobos Over Mars
Hurtling through space a mere 3,000 miles above the Martian surface, the diminutive moon Phobos (below and left of center) was imaged against the backdrop of a large shield volcano by the Viking 2 Orbiter in 1977.
Bright Stars, Dim Galaxy
These two clusters of bright, newly formed stars surrounded by a glowing nebula lie 10 million light years away in the dim, irregular galaxy cataloged as NGC 2366. The Hubble Space Telescope image shows...
The Earth Also Rises
The Lunar Orbiter 1 spacecraft was launched in 1966 to map the lunar surface in preparation for the Apollo moon landings. NASA's plucky robotic explorer performed its job well and pioneered this classic view of the Earth poised above the lunar horizon.