|
Why do most moons orbit their planets at the equator? (Intermediate)
|
Apr 99 |
68658 |
|
Do you believe in UFOs? (Beginner)
|
Apr 99 |
52204 |
|
Why are there no craters on Earth? Did all the meteorites miss us? (Beginner)
|
Apr 99 |
72933 |
|
Can life exist on the recently discovered extrasolar planets? (Beginner)
|
Apr 99 |
56819 |
|
How can two moons of Saturn share the same orbit? (Intermediate)
|
Apr 99 |
75166 |
|
How do you measure the mass of a star? (Beginner)
|
Apr 99 |
124741 |
|
What direction do planets rotate? (Beginner)
|
Apr 99 |
291910 |
|
Can you hear sounds in space? (Beginner)
|
Apr 99 |
523259 |
|
How can we measure distances to more stars? (Intermediate)
|
Apr 99 |
53152 |
|
Where did all the water in the universe come from? (Intermediate)
|
Apr 99 |
97414 |
|
Why doesn't gravity change the speed of light? (Beginner)
|
Apr 99 |
51948 |
|
How can you tell the difference between single and multiple extrasolar planets? (Intermediate)
|
Apr 99 |
36563 |
|
Do you think it's possible to maintain life on other planets? (Beginner)
|
Apr 99 |
62966 |
|
When unmanned spacecraft accelerate in space, what causes them to slow down? (Intermediate)
|
Apr 99 |
52815 |
|
What are Altitude and Azimuth? (Intermediate)
|
Apr 99 |
116786 |
|
Do dead stars still shine? (Beginner)
|
Apr 99 |
80466 |
|
How does light pollution affect astronomers? (Intermediate)
|
Apr 99 |
120222 |
|
Have gravitational waves been proven to exist? (Intermediate)
|
Apr 99 |
50828 |
|
What is a Dyson Sphere? (Intermediate)
|
Apr 99 |
45369 |
|
Why do we not have eclipses every month? (Beginner)
|
Mar 99 |
243926 |
|
Do astronomers believe in astrology? (Beginner)
|
Mar 99 |
63536 |
|
Which planets have rings? (Beginner)
|
Mar 99 |
484310 |
|
What equipment do I need for astrophotography? (Advanced)
|
Mar 99 |
54146 |
|
How are photons created and destroyed? (Advanced)
|
Mar 99 |
105434 |
|
Why search for only Earth-like life on other planets? (Beginner)
|
Mar 99 |
45672 |
|
How do we know the mass of the Earth and the Moon? (Advanced)
|
Mar 99 |
143517 |
|
Why is twilight short near the equator? (Intermediate)
|
Mar 99 |
139357 |
|
What kind of telescope should I use for astrophotography? (Beginner)
|
Mar 99 |
46865 |
|
Does the shuttle worry about space junk? (Beginner)
|
Mar 99 |
41531 |
|
Why do stars change colour when they twinkle? (Beginner)
|
Mar 99 |
148527 |
|
How can I contribute to science as an amateur astronomer? (Advanced)
|
Mar 99 |
51037 |
|
Can the theory of formation of the solar system explain all the observables? (Intermediate)
|
Mar 99 |
60321 |
|
What do stellar classifications mean? (Beginner)
|
Mar 99 |
45276 |
|
Could we be seeing dead stars? (Beginner)
|
Mar 99 |
51067 |
|
Can one star orbit another? (Beginner)
|
Mar 99 |
53061 |
|
Why can't you see stars during the day? (Beginner)
|
Mar 99 |
163807 |
|
What would happen if you took off your helmet in space? (Beginner)
|
Mar 99 |
177645 |
|
What makes a satellite geosyncronise itself with Earth's orbit? (Intermediate)
|
Mar 99 |
58370 |
|
Why is it important to study meteorites? (Beginner)
|
Mar 99 |
70288 |
|
Why does the Moon look big on the horizon? (Intermediate)
|
Mar 99 |
80650 |
|
When was the last time all of the planets were aligned? (Beginner)
|
Mar 99 |
578551 |
|
How did asteroids form and what is the difference between an asteroid and a comet? (Beginner)
|
Mar 99 |
106684 |
|
How do we measure distances to other stars? (Beginner)
|
Mar 99 |
56433 |
|
What are the requirements for being a planet? (Beginner)
|
Mar 99 |
216033 |
|
If comets are boiling away, why are there any left? (Intermediate)
|
Mar 99 |
65946 |
|
What is sidereal time? (Beginner)
|
Mar 99 |
56874 |
|
Which hemisphere has the best view of the Milky Way? (Beginner)
|
Mar 99 |
96679 |
|
Why do all the planets orbit in the same plane? (Intermediate)
|
Mar 99 |
305720 |
|
How are elements heavier than iron formed? (Intermediate)
|
Feb 99 |
182132 |
|
Are time machines possible? (Intermediate)
|
Jan 99 |
53160 |
|
Are the asteroids the remains of a planet which broke apart? (Beginner)
|
Jan 99 |
55030 |
|
What is a nova? (Beginner)
|
Jan 99 |
202732 |
|
Who first measured the speed of light? (Intermediate)
|
Jan 99 |
149330 |
|
How do gravitons escape black holes to tell the universe about their gravity? (Advanced)
|
Jan 99 |
96256 |
|
How do we know the age of the Universe and the Earth? (Intermediate)
|
Jan 99 |
284758 |
|
What is that ring (or rainbow) around the moon? (Beginner)
|
Jan 99 |
362327 |
|
How could galaxies have gotten so far away in only 14 billion years? (Intermediate)
|
Jan 99 |
55999 |
|
Where are stars born? (Beginner)
|
Jan 99 |
87048 |
|
Can you see satellites? (Beginner)
|
Jan 99 |
80740 |
|
What kinds of star clusters are there? (Intermediate)
|
Jan 99 |
44819 |
|
What is the life cycle of a star? (Intermediate)
|
Jan 99 |
303048 |
|
How do I tell which planet is which? (Beginner)
|
Jan 99 |
73993 |
|
Why do stars twinkle? (Beginner)
|
Jan 99 |
446809 |
|
Can HST see the Oort cloud? (Intermediate)
|
Jan 99 |
41105 |
|
What is the shape of the universe? (Intermediate)
|
Jan 99 |
95668 |
|
How can geometry be different in space? (Intermediate)
|
Jan 99 |
50859 |
|
If the universe is 13.8 billion years old, how can it be larger than 13.8 billion light years across? (Advanced)
|
Jan 99 |
70406 |
|
Why are there blue shifted galaxies? (Intermediate)
|
Jan 99 |
70936 |
|
What is a dimension? (Intermediate)
|
Jan 99 |
67747 |
|
Will we get sucked into the black hole at the center of the Milky Way? (Beginner)
|
Jan 99 |
97195 |
|
Can you tell time by the Big Dipper? (Beginner)
|
Jan 99 |
47329 |
|
How powerful are quasars? (Intermediate)
|
Jan 99 |
45474 |
|
What happens when you change the mass of a White Dwarf or Neutron Star? (Intermediate)
|
Jan 99 |
62372 |
|
What caused Shoemaker-Levy 9 to split up? (Advanced)
|
Jan 99 |
49101 |
|
How do we know if the universe will keep expanding forever? (Intermediate)
|
Jan 99 |
94233 |
|
Why do planets not twinkle? (Intermediate)
|
Jan 99 |
127064 |
|
Can we find the place where the Big Bang happened? (Intermediate)
|
Jan 99 |
152965 |
|
What are the boundaries of the constellations? (Beginner)
|
Jan 99 |
46546 |
|
Why is our solar system so different from all the others we've found? (Intermediate)
|
Jan 99 |
71007 |
|
How do distant galaxies differ from those nearby? (Advanced)
|
Jan 99 |
45877 |
|
How long does it take for the Sun's light to reach us? (Beginner)
|
Jan 99 |
620875 |
|
Do electrons age? (Beginner)
|
Jan 99 |
43163 |
|
What causes seasons? (Beginner)
|
Jan 99 |
99786 |
|
What is time dilation? (Intermediate)
|
Dec 98 |
84346 |