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2 votes
0 answers
22 views

What are the technologies needed to make deep space LIDAR competitive with RADAR? Any plans for tests, prototypes or "pathfinder" systems?

1 vote
1 answer
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Range for Radius and Mass of Solar bodies

5 votes
1 answer
156 views

Would it be practical to map out the Kuiper Belt and Oort Cloud via Radar?

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How can I calculate the geocentric longitude of Pluto in a similar way to VSOP87's algorithm?

13 votes
3 answers
523 views

Did the Late Heavy Bombardment Period Happen Because of a Stellar System Collision?

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0 answers
40 views

How to find the Moon's node longitude crossing

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2 answers
85 views

the difference between the heliocentric and the geocentric

1 vote
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35 views

Meteor Triangulation

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29 views

For the SST/CHROMIS H-β spectral line at 4846 Angstrom (Å), what is the difference in solar altitude observed at wavelengths differing by ±0.1 Å?

13 votes
2 answers
2k views

Multiply Earth's orbital speed with square root of 2

4 votes
1 answer
183 views

Voyager spacecraft distance from Earth

2 votes
1 answer
267 views

The Poynting Robertson Effect

9 votes
3 answers
3k views

Unreasonable ratios in astronomy as ways of remembering

26 votes
4 answers
6k views

Is it coincidence that the earth's rotation and revolution are in the same direction?

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