|
Why do most moons orbit their planets at the equator? (Intermediate)
|
Apr 99 |
100509 |
|
Do you believe in UFOs? (Beginner)
|
Apr 99 |
72159 |
|
Why are there no craters on Earth? Did all the meteorites miss us? (Beginner)
|
Apr 99 |
117386 |
|
Can life exist on the recently discovered extrasolar planets? (Beginner)
|
Apr 99 |
79015 |
|
How can two moons of Saturn share the same orbit? (Intermediate)
|
Apr 99 |
98738 |
|
How do you measure the mass of a star? (Beginner)
|
Apr 99 |
168742 |
|
What direction do planets rotate? (Beginner)
|
Apr 99 |
424312 |
|
Can you hear sounds in space? (Beginner)
|
Apr 99 |
615449 |
|
How can we measure distances to more stars? (Intermediate)
|
Apr 99 |
73362 |
|
Where did all the water in the universe come from? (Intermediate)
|
Apr 99 |
132629 |
|
Why doesn't gravity change the speed of light? (Beginner)
|
Apr 99 |
68491 |
|
How can you tell the difference between single and multiple extrasolar planets? (Intermediate)
|
Apr 99 |
52876 |
|
Do you think it's possible to maintain life on other planets? (Beginner)
|
Apr 99 |
81036 |
|
When unmanned spacecraft accelerate in space, what causes them to slow down? (Intermediate)
|
Apr 99 |
78100 |
|
What are Altitude and Azimuth? (Intermediate)
|
Apr 99 |
155766 |
|
Do dead stars still shine? (Beginner)
|
Apr 99 |
108630 |
|
How does light pollution affect astronomers? (Intermediate)
|
Apr 99 |
159250 |
|
Have gravitational waves been proven to exist? (Intermediate)
|
Apr 99 |
73266 |
|
What is a Dyson Sphere? (Intermediate)
|
Apr 99 |
62119 |
|
Why do we not have eclipses every month? (Beginner)
|
Mar 99 |
363859 |
|
Do astronomers believe in astrology? (Beginner)
|
Mar 99 |
92690 |
|
Which planets have rings? (Beginner)
|
Mar 99 |
580389 |
|
What equipment do I need for astrophotography? (Advanced)
|
Mar 99 |
75247 |
|
How are photons created and destroyed? (Advanced)
|
Mar 99 |
167771 |
|
Why search for only Earth-like life on other planets? (Beginner)
|
Mar 99 |
65845 |
|
How do we know the mass of the Earth and the Moon? (Advanced)
|
Mar 99 |
189907 |
|
Why is twilight short near the equator? (Intermediate)
|
Mar 99 |
203990 |
|
What kind of telescope should I use for astrophotography? (Beginner)
|
Mar 99 |
65346 |
|
Does the shuttle worry about space junk? (Beginner)
|
Mar 99 |
59942 |
|
Why do stars change colour when they twinkle? (Beginner)
|
Mar 99 |
211401 |
|
How can I contribute to science as an amateur astronomer? (Advanced)
|
Mar 99 |
71029 |
|
Can the theory of formation of the solar system explain all the observables? (Intermediate)
|
Mar 99 |
90776 |
|
What do stellar classifications mean? (Beginner)
|
Mar 99 |
67234 |
|
Could we be seeing dead stars? (Beginner)
|
Mar 99 |
76073 |
|
Can one star orbit another? (Beginner)
|
Mar 99 |
69594 |
|
Why can't you see stars during the day? (Beginner)
|
Mar 99 |
232562 |
|
What would happen if you took off your helmet in space? (Beginner)
|
Mar 99 |
261231 |
|
What makes a satellite geosyncronise itself with Earth's orbit? (Intermediate)
|
Mar 99 |
90179 |
|
Why is it important to study meteorites? (Beginner)
|
Mar 99 |
103416 |
|
Why does the Moon look big on the horizon? (Intermediate)
|
Mar 99 |
101069 |
|
When was the last time all of the planets were aligned? (Beginner)
|
Mar 99 |
779329 |
|
How did asteroids form and what is the difference between an asteroid and a comet? (Beginner)
|
Mar 99 |
136271 |
|
How do we measure distances to other stars? (Beginner)
|
Mar 99 |
75961 |
|
What are the requirements for being a planet? (Beginner)
|
Mar 99 |
338775 |
|
If comets are boiling away, why are there any left? (Intermediate)
|
Mar 99 |
85174 |
|
What is sidereal time? (Beginner)
|
Mar 99 |
87848 |
|
Which hemisphere has the best view of the Milky Way? (Beginner)
|
Mar 99 |
126939 |
|
Why do all the planets orbit in the same plane? (Intermediate)
|
Mar 99 |
422923 |
|
How are elements heavier than iron formed? (Intermediate)
|
Feb 99 |
246537 |
|
Are time machines possible? (Intermediate)
|
Jan 99 |
69388 |
|
Are the asteroids the remains of a planet which broke apart? (Beginner)
|
Jan 99 |
77482 |
|
What is a nova? (Beginner)
|
Jan 99 |
243989 |
|
Who first measured the speed of light? (Intermediate)
|
Jan 99 |
185967 |
|
How do gravitons escape black holes to tell the universe about their gravity? (Advanced)
|
Jan 99 |
133535 |
|
How do we know the age of the Universe and the Earth? (Intermediate)
|
Jan 99 |
334535 |
|
What is that ring (or rainbow) around the moon? (Beginner)
|
Jan 99 |
430248 |
|
How could galaxies have gotten so far away in only 14 billion years? (Intermediate)
|
Jan 99 |
80797 |
|
Where are stars born? (Beginner)
|
Jan 99 |
109753 |
|
Can you see satellites? (Beginner)
|
Jan 99 |
105181 |
|
What kinds of star clusters are there? (Intermediate)
|
Jan 99 |
63764 |
|
What is the life cycle of a star? (Intermediate)
|
Jan 99 |
341573 |
|
How do I tell which planet is which? (Beginner)
|
Jan 99 |
113498 |
|
Why do stars twinkle? (Beginner)
|
Jan 99 |
575396 |
|
Can HST see the Oort cloud? (Intermediate)
|
Jan 99 |
58010 |
|
What is the shape of the universe? (Intermediate)
|
Jan 99 |
121802 |
|
How can geometry be different in space? (Intermediate)
|
Jan 99 |
66819 |
|
If the universe is 13.8 billion years old, how can it be larger than 13.8 billion light years across? (Advanced)
|
Jan 99 |
101320 |
|
Why are there blue shifted galaxies? (Intermediate)
|
Jan 99 |
96348 |
|
What is a dimension? (Intermediate)
|
Jan 99 |
91902 |
|
Will we get sucked into the black hole at the center of the Milky Way? (Beginner)
|
Jan 99 |
130973 |
|
Can you tell time by the Big Dipper? (Beginner)
|
Jan 99 |
65469 |
|
How powerful are quasars? (Intermediate)
|
Jan 99 |
61087 |
|
What happens when you change the mass of a White Dwarf or Neutron Star? (Intermediate)
|
Jan 99 |
86616 |
|
What caused Shoemaker-Levy 9 to split up? (Advanced)
|
Jan 99 |
68218 |
|
How do we know if the universe will keep expanding forever? (Intermediate)
|
Jan 99 |
132895 |
|
Why do planets not twinkle? (Intermediate)
|
Jan 99 |
169721 |
|
Can we find the place where the Big Bang happened? (Intermediate)
|
Jan 99 |
275404 |
|
What are the boundaries of the constellations? (Beginner)
|
Jan 99 |
68806 |
|
Why is our solar system so different from all the others we've found? (Intermediate)
|
Jan 99 |
98741 |
|
How do distant galaxies differ from those nearby? (Advanced)
|
Jan 99 |
67043 |
|
How long does it take for the Sun's light to reach us? (Beginner)
|
Jan 99 |
764305 |
|
Do electrons age? (Beginner)
|
Jan 99 |
61498 |
|
What causes seasons? (Beginner)
|
Jan 99 |
134381 |
|
What is time dilation? (Intermediate)
|
Dec 98 |
115921 |