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Astronomy Picture Of the Day (APOD)
Protoplanetary Survivors in Orion
4.05.2001
The Orion Nebula is a nuturing stellar nursery filled with hot young stars and their natal clouds of gas and dust. But for planetary systems, the active star-forming region can present a hazardous and inhospitable birthplace.
Far Side of the Sun
3.05.2001
You may think it's impossible to see through the Sun, but maps of the Sun's far side are now made routinely by instruments on board the sun-staring SOHO spacecraft. This is one such map from April 12.
Planet Building in HD 100546
2.05.2001
More than 100 billion boulders may be swarming in the disk around nearby star HD 100546. In a scene thought similar to the early years of our own Solar System, ever larger rocks are growing by colliding and accreting dust as the messy business of planet formation appears to be underway.
Antarctica Hears Little Matter in the Big Bang
1.05.2001
On the frozen tundra near the bottom of our world, increasingly sophisticated instruments listen for a more precise echo of how our universe started. Sunday, independent collaborations behind three such instruments announced evidence that...
Approaching the International Space Station
30.04.2001
Earlier this month the crew of the US Space Shuttle Endeavor took in this view as they approached the developing International Space Station (ISS). The Endeavor and ISS crew installed Italy's Raffaello...
Ice Fishing for Cosmic Neutrinos
29.04.2001
Scientists are melting holes in the bottom of the world. In fact, several holes have been melted near the South Pole, and they are now being used as astronomical observatories. Astronomers with the Antarctic Muon and Neutrino Detector Array (AMANDA) lower into each vertical lake a string knotted with basketball-sized light detectors.
The Moon and All the Crashes
28.04.2001
A clear blue summer sky finally grows dark and the new telescope, hastily set up in the backyard, generates excitment and anticipation. "I bought it for the kids.", Dad assures himself as he anxiously supervises two young boys' efforts to center a bright, first quarter Moon in the finder.
Visitors Galaxy Gallery
27.04.2001
A tantalizing assortment of island universes is assembled here. From top left to bottom right are the lovely but distant galaxies M61, NGC 4449, NGC 4725, NGC 5068, NGC 5247, and NGC 5775/5774. Most are spiral galaxies more or less like our own Milky Way.
Horsehead Rides Again
26.04.2001
Difficult to see in small telescopes, the Horsehead nebula was recently selected by internet voters as a target for the Hubble Space Telescope. Above (top) is Hubble's detailed view of the dark cosmic dust cloud, released to celebrate the 11th anniversary of the workhorse orbiting observatory.
Space Laser Creates Artificial Star
25.04.2001
Some astronomers don't like stars. Bright star fluctuations can indicate how the Earth's atmosphere is changing, but many times no bright star exists in the direction where atmospheric information is needed.
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