AstroShannon
  • Member for 1 year, 6 months
  • Last seen more than 1 year ago
  • USA
How did the Archimedes crater fill with lava?
Accepted answer
6 votes

Great question! The mare lava bubbled up through fractures in the floor of the crater, burying its ring system and central peak.

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Is it possible to find what crater the Mars meteorites come from?
5 votes

Scientists think they have - the Mojave crater. Also see https://science.sciencemag.org/content/343/6177/1343

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Two luminous points disappearing in the sky
Accepted answer
4 votes

Edit 1: @JohnHoltz correctly pointed out two errors - geosats are on the equator, not ecliptic. My brain was thinking "equator" but my fingers had other plans. I read about geosat flares ...

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Timekeeping on other celestial bodies than Earth
4 votes

The HORIZONS web interface allows for you to change the observer location to other bodies in the solar system. Select "Observer location [change] and read the instructions carefully. I was able ...

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Calculate object apparent diameter by distance and radius
Accepted answer
4 votes

If I understand correctly, you are trying to create a realistic looking view of the stars rendered (in the game) on a dome surrounding the game play area. So you don't need to fly through the stars ...

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Events I cannot explain
3 votes

Both of these sound like satellites reflecting the Sun, even the first one which didn't fade. There are so many satellites now with unusual orbits that being close to midnight in time doesn't mean ...

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Are there ways to determine a star's spectral type without the spectrum itself?
3 votes

The color index of the star can give you that information. I can look it up for you if I know which exoplanet you're interested in, or you can find it in the NASA Exoplanet Database here.

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How to invert fits headers order (primary/secondary)?
2 votes

EDIT: I moved the last paragraph to the beginning because it's really a Python question, but I left my "manual" method answer in case it helps, too. Forgot to add this link to Python code ...

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Has any of the orbiters or rover on Mars captured image of comet NEOWISE?
2 votes

Not yet, as far as I can tell. The comet looks very different from Mars and while I haven't done the math, I don't think it has an apparent size from the rovers' perspectives to make it look like ...

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What does BJD-2450000 mean?
2 votes

The advantages of using Julian dates (and what to do with the "- 2450000" part) have been described well in previous answers but if you're curious about the "barycentric" part here'...

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Can the period of the planet transit across the sun be calculated in the same way the eclipse year is?
2 votes

I apologize for the length of this in advance! Before getting to the answer it should be said from an orbital mechanics point of view all transits are eclipses and all eclipses are transits. There ...

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What satellite is this?
1 votes

It sounds like a tumbling satellite and by your description of the different locations in the sky during the second pass, it sounds like you saw the same one over the course of two orbits. Maybe not, ...

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How Can I interpret this particular light curve without reading data on the side
1 votes

The radius of the planet is 0.17% of Jupiter's radius. Under the "Planet" info on the left, it says $R_P$ which is the radius of planet, and since the units are shown as $[R_J]$ this is the ...

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