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The Moon slows the Earth's rotation, but how fast was it spinning billions of years ago? (Intermediate)
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May 06 |
108624 |
|
Where do planetary rings come from, and what are they made of? (Beginner)
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Aug 05 |
80313 |
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Is there oxygen in the atmospheres of other planets? (Intermediate)
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Aug 05 |
117775 |
|
Does the Moon rotate? (Beginner)
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Aug 04 |
82829 |
|
How can we tell what the interiors of planets are like? (Advanced)
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Jun 04 |
72027 |
|
How long has there been water on Earth? (Intermediate)
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Apr 04 |
89213 |
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How fast does the Earth go at perihelion and aphelion? (Intermediate)
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Mar 04 |
118735 |
|
How do unmanned space probes avoid running into things? (Beginner)
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Nov 03 |
67318 |
|
Why did the Pioneer and Voyager take only 2 years to reach Jupiter, while Galileo and Cassini took more than 5 years? (Intermediate)
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Nov 03 |
70690 |
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Why doesn't the hydrogen on Jupiter explode? (Intermediate)
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Sep 03 |
55883 |
|
What do astronauts eat in space? Can they grow food? (Beginner)
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Feb 03 |
254184 |
|
Why do spacecraft need heat shields coming back to Earth but not leaving? (Intermediate)
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Jan 03 |
62564 |
|
Why are Saturn's rings flat? (Intermediate)
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Dec 02 |
86631 |
|
How big a change in the Earth's orbit would be required to destroy all life? (Intermediate)
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Nov 02 |
92230 |
|
Will the Leonid meteor shower go away? (Beginner)
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Nov 02 |
53432 |
|
A line drawn perpendicular to a line through the tips of the horns of the crescent moon doesn't point to the Sun! Why not? (Advanced)
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Nov 02 |
60273 |
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What are the names of the earth, moon, sun, and solar system? (Beginner)
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Oct 02 |
506652 |
|
What's that dark spot on the Sun? (Beginner)
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Aug 02 |
58439 |
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How can I calculate the position or path of the Sun for a given time and location? (Intermediate)
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Aug 02 |
117005 |
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Does the Moon rotate? Are there other moons that always keep one face toward their planet? (Intermediate)
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Jul 02 |
460766 |
|
What would happen if an asteroid 10 kilometers across hit the Earth? (Beginner)
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Jul 02 |
247725 |
|
Can astronauts produce water in space? (Intermediate)
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Jun 02 |
65610 |
|
Did life originate on Earth, or did it come from somewhere else? (Intermediate)
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May 02 |
77024 |
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Is the Moon moving away from the Earth? When was this discovered? (Intermediate)
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May 02 |
913498 |
|
Why are the compositions of comets and asteroids different? (Intermediate)
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May 02 |
61350 |
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Who discovered each planet? (Intermediate)
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May 02 |
168159 |
|
How do we feel heat? (Intermediate)
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May 02 |
97125 |
|
How was the starting point for the Julian Date system chosen? (Advanced)
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May 02 |
65891 |
|
Why is it called astronomy when all the other sciences end in -ology? (Beginner)
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May 02 |
48887 |
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How does libration allow us to see more than 50% of the Moon? (Advanced)
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Apr 02 |
49320 |
|
Why are stars and planets round? (Beginner)
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Feb 02 |
168790 |
|
Did astronauts really go to the Moon, or is it a hoax? (Beginner)
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Feb 02 |
123001 |
|
How much time do astronomers spend looking through telescopes? (Beginner)
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Jan 02 |
62530 |
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How much money do astronomers make? (Intermediate)
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Jan 02 |
173083 |
|
What's the best college for astronomy? (Intermediate)
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Jan 02 |
100984 |
|
What kind of schooling is necessary to become an astronomer? (Intermediate)
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Jan 02 |
158879 |
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What skills do astronomers need? (Beginner)
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Jan 02 |
111466 |
|
What's the best thing about being an astronomer? (Beginner)
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Jan 02 |
61069 |
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What do I need to do to become an astronomer? (Beginner)
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Jan 02 |
156157 |
|
What kinds of jobs do astronomers do? (Intermediate)
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Jan 02 |
91802 |
|
What's the difference between astronomy and astrology? (Beginner)
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Jan 02 |
243214 |
|
What's the difference between astronomy and astrophysics? (Intermediate)
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Jan 02 |
124289 |