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uhoh's user avatar
uhoh's user avatar
uhoh
  • Member for 8 years, 8 months
  • Last seen this week
  • Taipei, Earth
6 votes

Why is the L3 Lagrangian point not perfectly stable? And why is the Earth-Sun L3 point a bit less than one A.U.?

6 votes

Computing the rate of orbital decay

6 votes
Accepted

What is the definition of a "pole" of a celestial body?

6 votes

What orbital period would produce one New Moon (and one Full Moon) each year? What other effects would this produce?

6 votes
Accepted

Would a black hole passing next to a star create a deadly focal point due to gravitational lensing?

6 votes
Accepted

GW190521 black hole merger total mass calculation and missing mass, how does this happen?

5 votes

What's the farthest point humans have explored?

5 votes
Accepted

Why does a right-handed circular polarized wave get lagged when going through ionized plasma?

5 votes

What will succeed the Arecibo Observatory?

5 votes
Accepted

Orbits of Trojan Asteroids

5 votes
Accepted

What are the dark spots in the "face of Mars" picture?

5 votes

Whether the comet is moving in an elliptical or hyperbolic orbit around the sun?

5 votes
Accepted

Does the Barycenter shift/combine when 2 planets line up with the sun?

5 votes

Are astronomical studies with no "proprietary period" for data organized differently than studies with "proprietary period"?"

5 votes

Has the small meteorite that hit Webb done a lot of damage?

5 votes
Accepted

Is "monochromatic source" different than "monochromator" in astronomical instrumentation?

5 votes

Why do planets just look like a dark ball in my telescope

5 votes

Steadily bright light, moving in sky before sunrise

5 votes

Can we estimate the orbital period of the planet Phaeton (destroyed planet between Mars and Jupiter)?

5 votes

Generate a uniform distribution on the sky

5 votes

Is this scaling of JWST halo reasonably correct

5 votes

How, precisely, do radio astronomers detect (and record) the phases of waves for interferometry?

5 votes

Is Carl Sagan's famous "snowflake" quote correct?

5 votes
Accepted

Lagrange points for bodies in elliptical orbits?

5 votes
Accepted

Question about the Figure-eight periodic planar three-body motion

5 votes
Accepted

Inverse of the sunrise equation - finding locations with a given sunrise time on a given day

5 votes
Accepted

Pinhole projector for the Transit of Mercury

5 votes

Photosphere is relatively transparent. Is that right?

5 votes

When will the next series of mutual eclipses of Jupiter's moons begin?

5 votes
Accepted

When are the planets occulted by the sun?

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