46 votes

Can a lunar eclipse happen at night and be followed by a solar eclipse the next day?

No. A lunar eclipse occurs when the moon is on the opposite side of the Earth as the sun. A solar eclipse occurs when the moon is on the same side of the Earth as the sun. And it takes the moon 14 ...
James K's user avatar
  • 121k
11 votes

Can a lunar eclipse happen at night and be followed by a solar eclipse the next day?

Yes… if you're on Mars. Earth's Moon is far enough from Earth that its synodic orbital period (i.e. the time between two full moons or two new moons) is about 29.5 Earth days. The time between a full ...
Ilmari Karonen's user avatar
5 votes

Is the Moon really oscillating around its orbit as seen from Earth?

This is a perspective effect. We are on a revolving planet, so as the planet rotates, the moon will appear to move slightly with respect to the distant stars. You can see that if you place yourself ...
James K's user avatar
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4 votes
Accepted

How can I plot a rotary cam for the equation of time?

Following the video, the shape of the cam is a polar plot of the equation of time, with an offset to keep the values positive. You can use any of the trigonometric approximations to the equation of ...
James K's user avatar
  • 121k
4 votes

Why is the lunar disk completely black during solar eclipses?

It's not, but it is much dimmer than the solar corona. And your eyes perceive the disc as being completely black. Careful photography can image the moon's disc during a total eclipse. This composite ...
James K's user avatar
  • 121k
2 votes
Accepted

Is the Moon's orbital plane angle relative to the ecliptic constant?

Not quite. The angle of the Moon's orbital plane with respect to the ecliptic is fairly constant at ~5.1° with a bit of variation as pointed out by @PM2Ring in their comment. The orbit and the plane ...
planetmaker's user avatar
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2 votes

Earth-Moon receding-approaching cycle?

"I got an answer by an astrophysicist where he said that in reality what would happen is that the Moon will recede up to the point where the orbit would be unstable and chaotic and therefore 3 ...
Michael_1812's user avatar
  • 1,416
1 vote

Is the Moon's orbital plane angle relative to the ecliptic constant?

Is this a correct understanding? Not exactly. The Sun is a huge perturber of the Moon's orbit. From a heliocentric perspective, the gravitational acceleration of the Moon toward the Sun is over twice ...
David Hammen's user avatar
  • 33.9k

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