Index

• Why is Mars red?
• Why do the outer gas giant planets rotate faster than the inner planets?
• How do we know that the Universe is accelerating?

• Why does the Moon look bigger?
• Do all comets approach the Sun along the plane of the ecliptic?
• Did space exist before the Big Bang?
• Can you deflect an asteroid with vibrations?

• Can we reveal the actual optical disk of another star than our sun's?
• What is the typical day of an astronomer like?
• Did I see a supernova?
• How can X-rays escape the gravity of black holes?
• How large is our solar system is when compared to other known solar sytems?
• What part of the Earth is nearest to the path of the moon?
• Do white holes exist and if they do can we see them?
• Why don't all planets have one moon like the earth? How do other planets acquire more than one moon?
• If the observable universe is analogous to a hollow plastic ball, then how thick is the plastic?
• Career in Astronomy interview
• How long woud it take to get Alpha Centauri?

• How long does it take for a white dwarf to cool?
• How do you start a career in finding comets and asteroids?
• At what point is the redness of the sunset no longer visible on the horizon?
• How can I visualize the movement of the Moon on the sky?
• Why does the rate of change of day length vary and why it is greatest at the equinox?
• What is Planet X? Is it true it has been observed/detected?
• What is the best landing place for a rover on Mars?

• Why do some planets have reverse rotation?
• What is the easiest way to measure the distance between the earth and the sun?
• Is Saturn the only planet that has rings?
• Can there be another planet in our solar system in the same orbit as earth but on the opposite side of the sun?
• How is it possible to look back and see the birth of the universe?
• How can astronomers say that the universe is expanding without knowing where the boundaries of the universe are?
• What would happen if I put my arm out in space without a space suit?
• If your skin was exposed in space and you bled would your blood be blue from lack of oxygen?
• How long would it take us to travel to Alpha Centauri?
• Why can't we go faster than the speed of light? Can we ever colonize other planets?
• What are some major challenges of human space exploration?
• What happens to "dead" satellites orbiting the Earth?
• What kind of damage do solar storms cause to satellites?
• Exactly how does a comet's tail form? Why doesn't a comet's gravity hold onto the gas?
• If the Universe is expanding and galaxies are rushing away from one another, why are the galaxies in the Local Group not flying apart?
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_{Images © Laurie Hatch}