|
Why do most moons orbit their planets at the equator? (Intermediate)
|
Apr 99 |
72642 |
|
Do you believe in UFOs? (Beginner)
|
Apr 99 |
54277 |
|
Why are there no craters on Earth? Did all the meteorites miss us? (Beginner)
|
Apr 99 |
80872 |
|
Can life exist on the recently discovered extrasolar planets? (Beginner)
|
Apr 99 |
59509 |
|
How can two moons of Saturn share the same orbit? (Intermediate)
|
Apr 99 |
78248 |
|
How do you measure the mass of a star? (Beginner)
|
Apr 99 |
132440 |
|
What direction do planets rotate? (Beginner)
|
Apr 99 |
319282 |
|
Can you hear sounds in space? (Beginner)
|
Apr 99 |
541955 |
|
How can we measure distances to more stars? (Intermediate)
|
Apr 99 |
55875 |
|
Where did all the water in the universe come from? (Intermediate)
|
Apr 99 |
102779 |
|
Why doesn't gravity change the speed of light? (Beginner)
|
Apr 99 |
53837 |
|
How can you tell the difference between single and multiple extrasolar planets? (Intermediate)
|
Apr 99 |
38436 |
|
Do you think it's possible to maintain life on other planets? (Beginner)
|
Apr 99 |
65116 |
|
When unmanned spacecraft accelerate in space, what causes them to slow down? (Intermediate)
|
Apr 99 |
56157 |
|
What are Altitude and Azimuth? (Intermediate)
|
Apr 99 |
125128 |
|
Do dead stars still shine? (Beginner)
|
Apr 99 |
83859 |
|
How does light pollution affect astronomers? (Intermediate)
|
Apr 99 |
126506 |
|
Have gravitational waves been proven to exist? (Intermediate)
|
Apr 99 |
53646 |
|
What is a Dyson Sphere? (Intermediate)
|
Apr 99 |
47516 |
|
Why do we not have eclipses every month? (Beginner)
|
Mar 99 |
266354 |
|
Do astronomers believe in astrology? (Beginner)
|
Mar 99 |
66901 |
|
Which planets have rings? (Beginner)
|
Mar 99 |
511689 |
|
What equipment do I need for astrophotography? (Advanced)
|
Mar 99 |
57091 |
|
How are photons created and destroyed? (Advanced)
|
Mar 99 |
114921 |
|
Why search for only Earth-like life on other planets? (Beginner)
|
Mar 99 |
47989 |
|
How do we know the mass of the Earth and the Moon? (Advanced)
|
Mar 99 |
151541 |
|
Why is twilight short near the equator? (Intermediate)
|
Mar 99 |
148789 |
|
What kind of telescope should I use for astrophotography? (Beginner)
|
Mar 99 |
49097 |
|
Does the shuttle worry about space junk? (Beginner)
|
Mar 99 |
43724 |
|
Why do stars change colour when they twinkle? (Beginner)
|
Mar 99 |
158188 |
|
How can I contribute to science as an amateur astronomer? (Advanced)
|
Mar 99 |
54001 |
|
Can the theory of formation of the solar system explain all the observables? (Intermediate)
|
Mar 99 |
63842 |
|
What do stellar classifications mean? (Beginner)
|
Mar 99 |
47943 |
|
Could we be seeing dead stars? (Beginner)
|
Mar 99 |
53719 |
|
Can one star orbit another? (Beginner)
|
Mar 99 |
55462 |
|
Why can't you see stars during the day? (Beginner)
|
Mar 99 |
176906 |
|
What would happen if you took off your helmet in space? (Beginner)
|
Mar 99 |
201487 |
|
What makes a satellite geosyncronise itself with Earth's orbit? (Intermediate)
|
Mar 99 |
62283 |
|
Why is it important to study meteorites? (Beginner)
|
Mar 99 |
76736 |
|
Why does the Moon look big on the horizon? (Intermediate)
|
Mar 99 |
82948 |
|
When was the last time all of the planets were aligned? (Beginner)
|
Mar 99 |
624662 |
|
How did asteroids form and what is the difference between an asteroid and a comet? (Beginner)
|
Mar 99 |
110924 |
|
How do we measure distances to other stars? (Beginner)
|
Mar 99 |
59006 |
|
What are the requirements for being a planet? (Beginner)
|
Mar 99 |
231645 |
|
If comets are boiling away, why are there any left? (Intermediate)
|
Mar 99 |
68340 |
|
What is sidereal time? (Beginner)
|
Mar 99 |
62519 |
|
Which hemisphere has the best view of the Milky Way? (Beginner)
|
Mar 99 |
101020 |
|
Why do all the planets orbit in the same plane? (Intermediate)
|
Mar 99 |
323993 |
|
How are elements heavier than iron formed? (Intermediate)
|
Feb 99 |
194158 |
|
Are time machines possible? (Intermediate)
|
Jan 99 |
55128 |
|
Are the asteroids the remains of a planet which broke apart? (Beginner)
|
Jan 99 |
58476 |
|
What is a nova? (Beginner)
|
Jan 99 |
208938 |
|
Who first measured the speed of light? (Intermediate)
|
Jan 99 |
153537 |
|
How do gravitons escape black holes to tell the universe about their gravity? (Advanced)
|
Jan 99 |
101772 |
|
How do we know the age of the Universe and the Earth? (Intermediate)
|
Jan 99 |
292379 |
|
What is that ring (or rainbow) around the moon? (Beginner)
|
Jan 99 |
374285 |
|
How could galaxies have gotten so far away in only 14 billion years? (Intermediate)
|
Jan 99 |
59190 |
|
Where are stars born? (Beginner)
|
Jan 99 |
89967 |
|
Can you see satellites? (Beginner)
|
Jan 99 |
83935 |
|
What kinds of star clusters are there? (Intermediate)
|
Jan 99 |
47171 |
|
What is the life cycle of a star? (Intermediate)
|
Jan 99 |
308787 |
|
How do I tell which planet is which? (Beginner)
|
Jan 99 |
80487 |
|
Why do stars twinkle? (Beginner)
|
Jan 99 |
476288 |
|
Can HST see the Oort cloud? (Intermediate)
|
Jan 99 |
43259 |
|
What is the shape of the universe? (Intermediate)
|
Jan 99 |
99411 |
|
How can geometry be different in space? (Intermediate)
|
Jan 99 |
53008 |
|
If the universe is 13.8 billion years old, how can it be larger than 13.8 billion light years across? (Advanced)
|
Jan 99 |
73261 |
|
Why are there blue shifted galaxies? (Intermediate)
|
Jan 99 |
74103 |
|
What is a dimension? (Intermediate)
|
Jan 99 |
71263 |
|
Will we get sucked into the black hole at the center of the Milky Way? (Beginner)
|
Jan 99 |
102471 |
|
Can you tell time by the Big Dipper? (Beginner)
|
Jan 99 |
49555 |
|
How powerful are quasars? (Intermediate)
|
Jan 99 |
47428 |
|
What happens when you change the mass of a White Dwarf or Neutron Star? (Intermediate)
|
Jan 99 |
65547 |
|
What caused Shoemaker-Levy 9 to split up? (Advanced)
|
Jan 99 |
51969 |
|
How do we know if the universe will keep expanding forever? (Intermediate)
|
Jan 99 |
100533 |
|
Why do planets not twinkle? (Intermediate)
|
Jan 99 |
134702 |
|
Can we find the place where the Big Bang happened? (Intermediate)
|
Jan 99 |
161880 |
|
What are the boundaries of the constellations? (Beginner)
|
Jan 99 |
49179 |
|
Why is our solar system so different from all the others we've found? (Intermediate)
|
Jan 99 |
75075 |
|
How do distant galaxies differ from those nearby? (Advanced)
|
Jan 99 |
48565 |
|
How long does it take for the Sun's light to reach us? (Beginner)
|
Jan 99 |
644394 |
|
Do electrons age? (Beginner)
|
Jan 99 |
45099 |
|
What causes seasons? (Beginner)
|
Jan 99 |
104246 |
|
What is time dilation? (Intermediate)
|
Dec 98 |
88754 |