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Astronomy Picture Of the Day (APOD)
NGC 2264: Stars, Dust, and Gas
24.04.2001
The nebula surrounding bright star S Mon is filled with dark dust and glowing gas. The strange shapes that haunt this star forming region originate from fine interstellar dust reacting in complex ways to the energetic light and hot gas being expelled by the young stars.
Space Shuttle Lifts Off for Space Station
23.04.2001
Last Thursday, Space Shuttle Endeavor lifted off on course for the latest round of building the International Space Station (ISS) in orbit around Earth. One of the highlights of the 11-day mission promises to be the installation of Canadarm2, a robotic arm that will assist in the future construction and utilization of the ISS.
Globular Cluster 47 Tucanae
22.04.2001
Stars come in bunches. Of the over 200 globular star clusters that orbit the center of our Milky Way Galaxy, 47 Tucanae is the second brightest globular cluster (behind Omega Centauri). Known to some affectionately as 47 Tuc or NGC 104, it is only visible from the Southern Hemisphere.
Apollo 12: Stereo View Near Surveyor Crater
21.04.2001
This weekend's stereo picture finds Apollo 12 astronaut Pete Conrad standing on the lunar surface near the southern rim of Surveyor Crater in November of 1969. With red/blue glasses you can gaze beyond the spacesuited Conrad across the magnificent desolation of the Moon's Ocean of Storms.
Io: Moon Over Jupiter
20.04.2001
How big is the Jovian moon Io? The most volcanic body in the Solar System, Io (usually pronounced "EYE-oh") is 3,600 kilometers in diameter, about the size of planet Earth's single large natural satellite.
Sunspot Stack
19.04.2001
Welcome to multiwavelength astronomy! From top to bottom, these stacked panels show the largest sunspot group in a decade in visible, extreme ultraviolet, and x-ray light. All were taken on March 29, around...
A Higher Dimensional Universe
18.04.2001
Does our universe have higher but unusual spatial dimensions? This idea has been gaining popularity to help explain why vastly separated parts of our universe appear so similar, and why the geometry of our universe does not seem to result naturally from the amounts of matter it
Colorful Water Clouds Over Mars
17.04.2001
One place where water can be found on Mars is in clouds. In the above picture colorful water clouds are visible just after sunrise in and around a maze of canyons known as Noctis Labyrinthus (the labyrinth of the night).
The Hydra Cluster of Galaxies
16.04.2001
The Hydra Cluster of Galaxies contains well over 100 bright galaxies - but perhaps fewer galaxies than might be expected from its mass. Clusters of galaxies are the largest gravitationally bound objects in the universe.
Diffraction Spikes: When Stars Look Like Crosses
15.04.2001
Unusual appendages around bright stars are commonplace, but never seem to be mentioned. What are they? First, a telescope brings starlight falling over a large area to a small area. To get at this...
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