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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 |
106003 |
|
Where do planetary rings come from, and what are they made of? (Beginner)
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Aug 05 |
78386 |
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Is there oxygen in the atmospheres of other planets? (Intermediate)
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Aug 05 |
113901 |
|
Does the Moon rotate? (Beginner)
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Aug 04 |
81203 |
|
How can we tell what the interiors of planets are like? (Advanced)
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Jun 04 |
69469 |
|
How long has there been water on Earth? (Intermediate)
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Apr 04 |
87773 |
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How fast does the Earth go at perihelion and aphelion? (Intermediate)
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Mar 04 |
114885 |
|
How do unmanned space probes avoid running into things? (Beginner)
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Nov 03 |
65565 |
|
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 |
68997 |
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Why doesn't the hydrogen on Jupiter explode? (Intermediate)
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Sep 03 |
54209 |
|
What do astronauts eat in space? Can they grow food? (Beginner)
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Feb 03 |
252489 |
|
Why do spacecraft need heat shields coming back to Earth but not leaving? (Intermediate)
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Jan 03 |
60926 |
|
Why are Saturn's rings flat? (Intermediate)
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Dec 02 |
84197 |
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How big a change in the Earth's orbit would be required to destroy all life? (Intermediate)
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Nov 02 |
89521 |
|
Will the Leonid meteor shower go away? (Beginner)
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Nov 02 |
52164 |
|
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 |
58622 |
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What are the names of the earth, moon, sun, and solar system? (Beginner)
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Oct 02 |
492330 |
|
What's that dark spot on the Sun? (Beginner)
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Aug 02 |
57048 |
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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 |
114332 |
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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 |
456982 |
|
What would happen if an asteroid 10 kilometers across hit the Earth? (Beginner)
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Jul 02 |
237501 |
|
Can astronauts produce water in space? (Intermediate)
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Jun 02 |
63840 |
|
Did life originate on Earth, or did it come from somewhere else? (Intermediate)
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May 02 |
75619 |
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Is the Moon moving away from the Earth? When was this discovered? (Intermediate)
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May 02 |
895573 |
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Why are the compositions of comets and asteroids different? (Intermediate)
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May 02 |
59933 |
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Who discovered each planet? (Intermediate)
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May 02 |
158258 |
|
How do we feel heat? (Intermediate)
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May 02 |
93955 |
|
How was the starting point for the Julian Date system chosen? (Advanced)
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May 02 |
63981 |
|
Why is it called astronomy when all the other sciences end in -ology? (Beginner)
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May 02 |
47474 |
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How does libration allow us to see more than 50% of the Moon? (Advanced)
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Apr 02 |
48008 |
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Why are stars and planets round? (Beginner)
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Feb 02 |
165814 |
|
Did astronauts really go to the Moon, or is it a hoax? (Beginner)
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Feb 02 |
121271 |
|
How much time do astronomers spend looking through telescopes? (Beginner)
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Jan 02 |
61064 |
|
How much money do astronomers make? (Intermediate)
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Jan 02 |
171464 |
|
What's the best college for astronomy? (Intermediate)
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Jan 02 |
99384 |
|
What kind of schooling is necessary to become an astronomer? (Intermediate)
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Jan 02 |
156922 |
|
What skills do astronomers need? (Beginner)
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Jan 02 |
109131 |
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What's the best thing about being an astronomer? (Beginner)
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Jan 02 |
59804 |
|
What do I need to do to become an astronomer? (Beginner)
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Jan 02 |
151875 |
|
What kinds of jobs do astronomers do? (Intermediate)
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Jan 02 |
90765 |
|
What's the difference between astronomy and astrology? (Beginner)
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Jan 02 |
238730 |
|
What's the difference between astronomy and astrophysics? (Intermediate)
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Jan 02 |
120141 |