How does the Moon stay "suspended" in the air? (Intermediate)
|
Apr 05 |
166562 |
Would the biggest airplanes cause tsunamis if they crashed? (Intermediate)
|
Feb 05 |
59417 |
Do we really observe the edges of galaxies at different epochs? (Advanced)
|
Oct 04 |
58202 |
Do the Sun's or Earth's magnetic field reverse? (Intermediate)
|
Jan 04 |
73557 |
When are there 5 Sundays in February? (Intermediate)
|
Jan 04 |
80065 |
Are names given to black holes? (Advanced)
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Dec 03 |
99068 |
How can we find galaxies behind the Milky Way? (Intermediate)
|
Sep 03 |
90708 |
Can I communicate faster than light? (Advanced)
|
Aug 03 |
81518 |
Is there such a thing as hyperspace? (Intermediate)
|
May 03 |
58657 |
How do we know that sunspots are associated with the Sun's magnetic field? (Intermediate)
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Apr 03 |
65579 |
Does inflation allow for an infinite number of universes? (Advanced)
|
Apr 03 |
53034 |
What is the origin of the stellar classification system "OBAFGKM"? (Intermediate)
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Mar 03 |
79406 |
How are planets affected by the Hot Ionised Medium? (Advanced)
|
Mar 03 |
43198 |
Why don't people walk upside-down on the bottom of the Earth? (Beginner)
|
Mar 03 |
212094 |
How long has humanity known that we live in a galaxy similar to others in the Universe? (Intermediate)
|
Feb 03 |
53816 |
How are galaxy distances inferred from their recessional velocities? (Intermediate)
|
Jan 03 |
85200 |
Did I really hear a meteor? (Intermediate)
|
Jan 03 |
63609 |
Do we have to worry about relativity when studying galactic objects? (Intermediate)
|
Jan 03 |
49234 |
Does the temperature of matter increase as it is accelerated to relativistic speeds? (Advanced)
|
Dec 02 |
59433 |
How do sunrise and sunset times change with altitude? (Intermediate)
|
Nov 02 |
113527 |
How do we know what parameters to use when simulating the collision of the Milky Way and Andromeda? (Advanced)
|
Nov 02 |
63866 |
Can we look back far enough in time to see the Big Bang? (Beginner)
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Nov 02 |
112934 |
How can the Universe expand faster than the speed of light during inflation? (Advanced)
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Nov 02 |
145764 |
Why is pressure broadening greater in low mass stars than in high mass stars? (Advanced)
|
Nov 02 |
49864 |
Why is sea water salty, and not lake water? (Beginner)
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Nov 02 |
97911 |
How many moles of stars are in the known universe? (Beginner)
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Oct 02 |
71021 |
Do binary or triple star systems form together? (Intermediate)
|
Oct 02 |
53650 |
Why doesn't dark matter fall into a black hole? (Advanced)
|
Oct 02 |
81481 |
Where does the kinetic energy of infalling bodies come from? (Intermediate)
|
Oct 02 |
52778 |
Can astronomers observe anything when the moon is full? (Beginner)
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Oct 02 |
53289 |
Is there a beginning and an end to a galaxy's life? (Intermediate)
|
Oct 02 |
89090 |
What was that really big falling star that I saw? (Intermediate)
|
Oct 02 |
70146 |
How do you calculate the azimuth and altitude of an object? (Intermediate)
|
Oct 02 |
129323 |
Is the Moon seen as a crescent (and not a "boat") all over the world? Is the same phase of the moon visible from the Northern and Southern hemispheres? (Advanced)
|
Oct 02 |
143464 |
Why are the Moon and Sun sometimes orange or red? (Beginner)
|
Sep 02 |
501719 |
What is the origin of spiral structure in galaxies? (Intermediate)
|
Sep 02 |
98135 |
Why does the Sun appear larger on the horizon than overhead? (Intermediate)
|
Sep 02 |
134221 |
Can I see details on Venus? (Intermediate)
|
Sep 02 |
68837 |
Do the magnitudes and colors of stars ever change? (Intermediate)
|
Sep 02 |
67023 |
Why was the Platonic year named after Plato? (Intermediate)
|
Aug 02 |
60428 |
Can I calculate the size of the Universe by converting light years to kilometres? (Intermediate)
|
Aug 02 |
88864 |
Can the acceleration of the Universe be analogous to apparent acceleration in a airplane? (Intermediate)
|
Aug 02 |
73605 |
Why do photos of space taken from space never show any stars? (Intermediate)
|
Aug 02 |
84020 |
Is the Earth at the centre of the Universe? (Intermediate)
|
Aug 02 |
98343 |
How can a star burn with no oxygen? (Beginner)
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Jul 02 |
288134 |
How are galaxies and solar systems similar? (Advanced)
|
Jul 02 |
77607 |
Do supermassive black holes cause galaxy rotation? (Advanced)
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Jul 02 |
121718 |
What causes a particle to decay? (Intermediate)
|
Jul 02 |
63645 |
Who (and when) discovered that the earth's axis is on a 23 degree tilt? (Intermediate)
|
Jul 02 |
112599 |
Why do pictures of distant galaxies have higher resolution than those of nearby planets? (Intermediate)
|
Jun 02 |
79010 |
How is the Cepheid yardstick validated? (Advanced)
|
Jun 02 |
58019 |
What would happen if you went back in time and killed your grandmother? (Beginner)
|
Jun 02 |
57552 |
What colors are visible through an amateur telescope? (Intermediate)
|
Jun 02 |
71528 |
What elements make up the Sun? (Beginner)
|
Jun 02 |
212930 |
Is it possible to measure the temperature of the Sun? (Beginner)
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May 02 |
174732 |