|
Why do most moons orbit their planets at the equator? (Intermediate)
|
Apr 99 |
94300 |
|
Do you believe in UFOs? (Beginner)
|
Apr 99 |
68212 |
|
Why are there no craters on Earth? Did all the meteorites miss us? (Beginner)
|
Apr 99 |
111725 |
|
Can life exist on the recently discovered extrasolar planets? (Beginner)
|
Apr 99 |
74552 |
|
How can two moons of Saturn share the same orbit? (Intermediate)
|
Apr 99 |
94371 |
|
How do you measure the mass of a star? (Beginner)
|
Apr 99 |
162431 |
|
What direction do planets rotate? (Beginner)
|
Apr 99 |
410280 |
|
Can you hear sounds in space? (Beginner)
|
Apr 99 |
606830 |
|
How can we measure distances to more stars? (Intermediate)
|
Apr 99 |
70029 |
|
Where did all the water in the universe come from? (Intermediate)
|
Apr 99 |
127612 |
|
Why doesn't gravity change the speed of light? (Beginner)
|
Apr 99 |
64464 |
|
How can you tell the difference between single and multiple extrasolar planets? (Intermediate)
|
Apr 99 |
50070 |
|
Do you think it's possible to maintain life on other planets? (Beginner)
|
Apr 99 |
77490 |
|
When unmanned spacecraft accelerate in space, what causes them to slow down? (Intermediate)
|
Apr 99 |
73955 |
|
What are Altitude and Azimuth? (Intermediate)
|
Apr 99 |
151326 |
|
Do dead stars still shine? (Beginner)
|
Apr 99 |
103771 |
|
How does light pollution affect astronomers? (Intermediate)
|
Apr 99 |
154089 |
|
Have gravitational waves been proven to exist? (Intermediate)
|
Apr 99 |
69131 |
|
What is a Dyson Sphere? (Intermediate)
|
Apr 99 |
58846 |
|
Why do we not have eclipses every month? (Beginner)
|
Mar 99 |
344897 |
|
Do astronomers believe in astrology? (Beginner)
|
Mar 99 |
87488 |
|
Which planets have rings? (Beginner)
|
Mar 99 |
575635 |
|
What equipment do I need for astrophotography? (Advanced)
|
Mar 99 |
71500 |
|
How are photons created and destroyed? (Advanced)
|
Mar 99 |
158940 |
|
Why search for only Earth-like life on other planets? (Beginner)
|
Mar 99 |
61771 |
|
How do we know the mass of the Earth and the Moon? (Advanced)
|
Mar 99 |
183256 |
|
Why is twilight short near the equator? (Intermediate)
|
Mar 99 |
196415 |
|
What kind of telescope should I use for astrophotography? (Beginner)
|
Mar 99 |
62171 |
|
Does the shuttle worry about space junk? (Beginner)
|
Mar 99 |
56636 |
|
Why do stars change colour when they twinkle? (Beginner)
|
Mar 99 |
202664 |
|
How can I contribute to science as an amateur astronomer? (Advanced)
|
Mar 99 |
67949 |
|
Can the theory of formation of the solar system explain all the observables? (Intermediate)
|
Mar 99 |
85265 |
|
What do stellar classifications mean? (Beginner)
|
Mar 99 |
63185 |
|
Could we be seeing dead stars? (Beginner)
|
Mar 99 |
71329 |
|
Can one star orbit another? (Beginner)
|
Mar 99 |
66677 |
|
Why can't you see stars during the day? (Beginner)
|
Mar 99 |
222944 |
|
What would happen if you took off your helmet in space? (Beginner)
|
Mar 99 |
255988 |
|
What makes a satellite geosyncronise itself with Earth's orbit? (Intermediate)
|
Mar 99 |
85596 |
|
Why is it important to study meteorites? (Beginner)
|
Mar 99 |
98884 |
|
Why does the Moon look big on the horizon? (Intermediate)
|
Mar 99 |
96885 |
|
When was the last time all of the planets were aligned? (Beginner)
|
Mar 99 |
759206 |
|
How did asteroids form and what is the difference between an asteroid and a comet? (Beginner)
|
Mar 99 |
131235 |
|
How do we measure distances to other stars? (Beginner)
|
Mar 99 |
72553 |
|
What are the requirements for being a planet? (Beginner)
|
Mar 99 |
326091 |
|
If comets are boiling away, why are there any left? (Intermediate)
|
Mar 99 |
81647 |
|
What is sidereal time? (Beginner)
|
Mar 99 |
83583 |
|
Which hemisphere has the best view of the Milky Way? (Beginner)
|
Mar 99 |
121903 |
|
Why do all the planets orbit in the same plane? (Intermediate)
|
Mar 99 |
409703 |
|
How are elements heavier than iron formed? (Intermediate)
|
Feb 99 |
239018 |
|
Are time machines possible? (Intermediate)
|
Jan 99 |
66238 |
|
Are the asteroids the remains of a planet which broke apart? (Beginner)
|
Jan 99 |
74398 |
|
What is a nova? (Beginner)
|
Jan 99 |
238893 |
|
Who first measured the speed of light? (Intermediate)
|
Jan 99 |
179306 |
|
How do gravitons escape black holes to tell the universe about their gravity? (Advanced)
|
Jan 99 |
128371 |
|
How do we know the age of the Universe and the Earth? (Intermediate)
|
Jan 99 |
328268 |
|
What is that ring (or rainbow) around the moon? (Beginner)
|
Jan 99 |
422813 |
|
How could galaxies have gotten so far away in only 14 billion years? (Intermediate)
|
Jan 99 |
77274 |
|
Where are stars born? (Beginner)
|
Jan 99 |
106026 |
|
Can you see satellites? (Beginner)
|
Jan 99 |
101504 |
|
What kinds of star clusters are there? (Intermediate)
|
Jan 99 |
60521 |
|
What is the life cycle of a star? (Intermediate)
|
Jan 99 |
335684 |
|
How do I tell which planet is which? (Beginner)
|
Jan 99 |
108079 |
|
Why do stars twinkle? (Beginner)
|
Jan 99 |
569711 |
|
Can HST see the Oort cloud? (Intermediate)
|
Jan 99 |
55298 |
|
What is the shape of the universe? (Intermediate)
|
Jan 99 |
117668 |
|
How can geometry be different in space? (Intermediate)
|
Jan 99 |
64217 |
|
If the universe is 13.8 billion years old, how can it be larger than 13.8 billion light years across? (Advanced)
|
Jan 99 |
96261 |
|
Why are there blue shifted galaxies? (Intermediate)
|
Jan 99 |
91492 |
|
What is a dimension? (Intermediate)
|
Jan 99 |
87532 |
|
Will we get sucked into the black hole at the center of the Milky Way? (Beginner)
|
Jan 99 |
125805 |
|
Can you tell time by the Big Dipper? (Beginner)
|
Jan 99 |
62101 |
|
How powerful are quasars? (Intermediate)
|
Jan 99 |
58357 |
|
What happens when you change the mass of a White Dwarf or Neutron Star? (Intermediate)
|
Jan 99 |
82271 |
|
What caused Shoemaker-Levy 9 to split up? (Advanced)
|
Jan 99 |
65204 |
|
How do we know if the universe will keep expanding forever? (Intermediate)
|
Jan 99 |
127999 |
|
Why do planets not twinkle? (Intermediate)
|
Jan 99 |
164285 |
|
Can we find the place where the Big Bang happened? (Intermediate)
|
Jan 99 |
256354 |
|
What are the boundaries of the constellations? (Beginner)
|
Jan 99 |
64589 |
|
Why is our solar system so different from all the others we've found? (Intermediate)
|
Jan 99 |
93812 |
|
How do distant galaxies differ from those nearby? (Advanced)
|
Jan 99 |
63453 |
|
How long does it take for the Sun's light to reach us? (Beginner)
|
Jan 99 |
744471 |
|
Do electrons age? (Beginner)
|
Jan 99 |
57480 |
|
What causes seasons? (Beginner)
|
Jan 99 |
128939 |
|
What is time dilation? (Intermediate)
|
Dec 98 |
111121 |