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Astronomy Picture Of the Day (APOD)
Gamma Ray Moon
17.04.1999
What if you could see gamma rays (photons with more than 40 million times the energy of visible light)? If you could, the Moon would appear brighter than the Sun! This startling notion...
Upsilon Andromedae: An Extra Solar System
16.04.1999
Yesterday, astronomers announced the discovery of the first system of planets around a normal star other than our Sun. Previously, only single planet star systems had been found. Subtle changes in the wobble of Upsilon Andromedae, a Sun-like star in the constellation of Andromeda, allowed astronomers led by R. Paul Butler (AAO) and Geoffrey W.
Apollo 17s Moonship
15.04.1999
Awkward and angular looking, Apollo 17's lunar module Challenger was designed for flight in the vacuum of space. This sharp picture from the command module America, shows Challenger's ascent stage in lunar orbit.
The Backyard Universe
14.04.1999
How far can you see from your own backyard? Across the Solar System, even across our Galaxy, these sights are not difficult. Recently, however, amateur Paul Boltwood gazed across the universe. His record setting image is shown above in false color.
The Case of the Missing Supernova
13.04.1999
Would you notice a second Moon in the sky? About 700 years ago, light from a tremendous explosion reached Earth that should have appeared almost as bright as a full Moon. The bright spot should have lasted for weeks, yet no notation of such an occurrence has been found in historical records.
Nearby Spiral Galaxy NGC 4945
12.04.1999
For such a close galaxy, NGC 4945 is easy to miss. NGC 4945 is a spiral galaxy in the Centaurus Group of galaxies, located only six times farther away than the prominent Andromeda Galaxy. The thin disk galaxy is oriented nearly edge-on, however, and shrouded in dark dust.
Liftoff of Space Shuttle Columbia
11.04.1999
On April 12, 1981, space flight entered a new era with the first launch of Space Shuttle Columbia. NASA's Space Shuttles land like a normal airplane, carry a heavy cargo, carry a large crew, make use of cheap solid fuel, and are reusable.
Canaries Sky
10.04.1999
This gorgeous view of stars, nebulae, and the Milky Way comes from the dark night sky above the lovely island of La Palma in the Canaries archipelago. The picture was made by a group...
WR 104: Pinwheel Star
9.04.1999
Like a cosmic lawn sprinkler, dust streaming from a rotating star system creates a pinwheel pattern in this false color infrared image. Astronomers discovered the surprising star dust scenario using a sophisticated interferometer and the 10 meter Keck I telescope to observe the bright Wolf-Rayet star WR 104.
Apollo 12: Surveyor 3 and Intrepid
8.04.1999
On April 20, 1967, NASA's robot spacecraft Surveyor 3 landed on the moon, touching down on the inside slope of a small lunar crater in the Ocean of Storms. Over 2 1/2 years...
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