Greg Miller's user avatar
Greg Miller's user avatar
Greg Miller's user avatar
Greg Miller
  • Member for 5 years, 1 month
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59 votes
Accepted

In this image taken by Voyager 1, which is closer: the earth or the moon?

28 votes
Accepted

What could be an explanation for a satellite-like moving light in the night sky that dims over time

22 votes
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How do planetarium apps and software calculate positions?

20 votes

What is this, red, blue, white twinkling, star?

18 votes
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What positional accuracy (ie, arc seconds) is necessary to view Saturn, Uranus, beyond?

17 votes

Counting from the 21st century forward, what place on Earth will be last to experience a total solar eclipse?

14 votes

Huge galaxies seen from earth

13 votes

Where are Modern Constellation lines defined?

11 votes

The shape of the moon limb/crescent (terminator line)

10 votes
Accepted

What is the significance of the intersection in the analemma?

10 votes
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Will a 10mm eyepiece with a barlow 2x produce the same result as a 5mm eyepiece?

9 votes
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Does the universe have a celestial north?

9 votes
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Distance from Earth to Mars at time of November 8, 2022 lunar eclipse maximum

8 votes
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Calculate moon illumination given moon age

7 votes

What's the issue with Olbers' paradox?

6 votes

How do we know we're not getting bigger?

6 votes

Movement of stars over long periods of time

6 votes
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How does each degree equal to 60 minutes?

5 votes

Measurement unit of coordinate systems in astronomy

5 votes

How do astronomical spectrometers measure spectra from single stars separately, without contamination from all of the nearby stars?

5 votes

Radio signals between Mercury and the Moon during an eclipse

5 votes

Does stellar parallax only occur parallel to the ecliptic?

5 votes
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Planets positions (azimuth, altitude) API

4 votes
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Calculating velocity of Earth from JPL DE

4 votes
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Measuring distance to stars - How to get parallax angle

4 votes

How to choose eyepieces and other accessories for a Celestron 70mm f/5.7 portable refractor?

4 votes

How to find the first Julian day with the same Earth-Sun constellation

4 votes

Search good image for observable sky as seen from earth

4 votes
Accepted

How does one convert between Modified Julian Date (MJD) and a standard (mm/dd/yr, hr:mm:ss)

4 votes
Accepted

Sidereal times occuring twice a day question