All Questions
6
questions
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Estimate Saturn's mass [closed]
How can you estimate Saturn's mass using data from Cassini's final moments in September 2017 (apoapsis on September 12 at 1:27 a.m. EDT Saturn time at a distance of about $1.3*10^6$ km from Saturn, ...
2
votes
2
answers
284
views
How to measure the ratio of a planet's radius to a star?
I was reading a physics problem related to astronomy, and upon re-reading it, I realized that it could be really indicated to extrapolate some really interesting physics-related information.
One of ...
- 439
0
votes
2
answers
329
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How to represent orbital velocity of a planet on an elliptical path in terms of time?
Before reading this long message, please know that this is question is posted to know whether there is a method to find the relation between between the orbital velocity of a planet on an elliptical ...
- 115
1
vote
0
answers
189
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How is the precession rate of planets calculated? For which planets do we know the precession rates?
From what I've read, precession rates of Earth, Mars and Moon are known. Why is that?
And how is it calculated?
2
votes
2
answers
2k
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Planetary alignment of the gas giants?
There is this nice and new applet of the orbits of the planets around the sun:
Solar System Orrery
You can click and drag any planet and watch their relative orbits evolve in time. I was curious ...
- 221
0
votes
2
answers
741
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Planet in which satellite (moon) and star (sun) appear together once a year
With a hypothetical system, where the moon would be always on the opposite side of the planet than the sun, in a way that the moon would only be visible at night on the planet.
I don't know if this ...
