Bob516
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Whereabouts of the Pleiades
13 votes

To give you a perspective the Milky Way Galaxy is between 150,000 and 200,000 light years in across. The Pleiades is less than 450 light years from Earth. In a galactic perspective the Pleiades is ...

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Could Ganymede's aurora be seen with the naked eye?
Accepted answer
6 votes

The aurora depicted in the artist's conception is of ultraviolet light. It would not be seen with the naked eye. "NASA's Hubble Space Telescope observed a pair of auroral belts encircling the Jovian ...

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As matter approaches a black hole, does it speed up?
5 votes

The dilation of time is only relevant from the perspective of someone far away from the black hole. Close to the black hole time is still progressing forward at what would appear to be a normal rate ...

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What are other names for planetoids that aren't orbiting a solar system, but hurtling through space?
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4 votes

See nnnnnn's comment below. The NASA website, describing 'oumuamuam, uses the term "interstellar object." Extrasolar asteroid would seem to be another option. I haven't seen a unique word different ...

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Martian dust storms-what was the smallest in area, or shortest in duration storm detected?
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3 votes

SOLAR SYSTEM/SUN, ATMOSPHERES, EVOLUTION OF ATMOSPHERES | Planetary Atmospheres Numerous dust storms occur each Martian year and are generally classified according to size. From the smallest to ...

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How does energy (from fusion reactions still inside the sun) still have gravitational attraction?
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2 votes

I think it is best not to think of energy having a gravitational attraction, rather that energy, like mass, (since they are equivalent keeping in mind c) will curve spacetime. Electric charges, ...

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Would planet explode without gravity?
2 votes

The hydrostatic equilibrium only dictates that the object holds a spherical shape, it does not determine whether the matter will in a solid form. Gravity acts on planets, dwarf planets, comets, ...

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Does the Milky Way orbit around anything?
2 votes

For a visual representation of our home supercluster (mentioned above) consider this image, and this video, Laniakea: Our home supercluster might be helpful showing the local group in relation to ...

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