Meet the asteroids

Are they gonna hurt us?

Will they obliterate the earth?

How are asteroids found?

Did asteroids deliver life?

What are they made of?

What about comets?

Asteroids in orbit

Related Why Files


New planet

Water on the moon?

Neutrino telescope

Life on Mars?

Radio telescopes

Sputnik and science ed


Asteroid Searchers Streak Ahead, Robert Irion, Science, 14 August, 1998, pp. 894-5.

Crying Wolf, (on the March scare) Robert Naeye, Astronomy, September, 1998, p. 61.

Dynamical Lifetimes of Objects Injected Into Asteroid Belt Resonances, Brett Gladman et al, Science, 11 July, 1997, pp. 197-201.

The End of Evolution: On Mass Extinctions and the Preservation of Biodiversity, Peter Ward, Bantam Books, 1994.

Impact Hazards: Truth and Consequences, Gerrit Verschuur, Sky and Telescope, June, 1998, pp. 26-34.

Isotopic Evidence for the Cretaceous-Tertiary Impactor and Its Type, A. Shukolyukov and G. W. Lugmair, Science, 30 October, 1998.

Lunar Prospector Probes Moon's Core Mysteries, Robert Irion, Science, 4 Sept. 1998, pp. 1423-4.

Night Comes to the Cretaceous: Dinosaur Extinction and the Transformation of Modern Geology, James Powell, W.H. Freeman, 1998.

When North America Burned, Carl Zimmer, Discover, Feb. 1997, pp. 26 ff.



Spaceguard wants to guard us from -- you guessed it.

Here's what happened when Comet Shoemaker-Levy zapped Jupiter.

Home of JPL's Near-Earth Asteroid Tracking -effort.

The Near-Earth Objects page.

Planets found beyond the solar system(?)

Here's a statement on the mondo 1998 asteroid scare.

A nice portrait of asteroid 243 Ida.

Absolutely spacy: What else can you say about the Jet Propulsion Laboratory?

The amazing promise of X-ray astronomy.

Meet the responsible parties -- space cadets, all!

The Why Files
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