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51 votes
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How precise are future Solar eclipse timing, path and dates, what could change timing/path?

For the past few decades, the best eclipse data has been produced by Fred Espenak, aka Mr Eclipse. Fred is a former employee of NASA's GSFC. He's retired now, but he still maintains an excellent ...
PM 2Ring's user avatar
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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
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45 votes
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Why is there a year 1 B.C., a year 0, and a year 1 A.D. in NASA’s Five Millennium Canon of Solar Eclipses?

This is all explained on the home page All dates are astronomical dates. These match CE (or AD) dates for positive values but differ by 1 for BCE dates. The Gregorian calendar is used for all dates ...
James K's user avatar
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36 votes

Why is the lunar relief not visible in photographs of solar eclipses?

In short, you would need a very high resolution photo -- most likely taken through a telescope -- to identify any surface features on the moon by their effect on the limb (that is, the edge of the ...
Darth Pseudonym's user avatar
32 votes
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How do I know it is safe to remove eclipse glasses when viewing a total solar eclipse?

Eclipse glasses are so dark that nothing can be seen through them, except the surface of the sun. When you are looking through the eclipse glasses, if you can see any part of the sun at all, it is ...
James K's user avatar
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29 votes
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What do Saturn's rings look like during a total solar eclipse, viewed from one of its moons?

Cassini (the orbiter) has captured images of Saturn with the sun in eclipse: The rings are back-lit, They self-shadow quite well but not enough to completely block sunlight, so appear bright against ...
James K's user avatar
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26 votes
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What caused pink flares during the eclipse

That would have been the so called 'solar prominences' i.e. eruptions of plasma on the surface of the Sun (see https://www.iflscience.com/next-months-total-solar-eclipse-could-come-with-bright-pink-...
Thomas's user avatar
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20 votes
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Orbit of the moon so that there are no eclipses

Answer: yes, a no-eclipse orbit is possible The plane of the Earth-Sun orbit (the ecliptic) and the plane of the Earth-Moon orbit must intersect each other because they both contain at least one point ...
Woody's user avatar
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20 votes
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During a total solar eclipse is it possible to see solar flares with the naked eye?

If by 'solar flare' you mean a coronal mass ejection, then yes, in theory you could see one during a total eclipse if there happened to be one that was at approximately 90 degrees to Earth at the time ...
Darth Pseudonym's user avatar
18 votes

The darkness that is equivalent to the block of 99.5% of the sun

I agree with James K's observation that the main point of a total eclipse is not the darkness but the visibility of the corona. However, to answer your original question, blocking 99.5% of the Sun* ...
nanoman's user avatar
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18 votes

The darkness that is equivalent to the block of 99.5% of the sun

This misses the point. During totality the sun's corona becomes visible. If any part of the photosphere is exposed, then the corona isn't visible. The experience of a total eclipse is not just "...
James K's user avatar
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11 votes

During a total solar eclipse is it possible to see solar flares with the naked eye?

There are flares and then there are prominences These are rather different things. A solar flare is a sudden release of energy from the surface of the sun (including a lot of X-rays). A prominence is ...
James K's user avatar
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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
10 votes

The darkness that is equivalent to the block of 99.5% of the sun

There's no equivalent. At 99.5% coverage, the overall light level is comparable to that of twilight a few minutes after sunset. However, the majority of the light is still coming from a point source,...
Mark's user avatar
  • 3,393
9 votes

Orbit of the moon so that there are no eclipses

Answer: Yes, there are multiple no-eclipse orbits (other than the phase-shifted period solution by @woody) possible if we leverage various perturbation models of the two-body system. The J2 effect. ...
txp's user avatar
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9 votes
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What are the best options for watching total or partial solar eclipse during bad weather conditions?

Your profile says you're from Massachusetts. The weather in northeast US looks to be very good for eclipse viewing: I would take that eight hour hit if I lived in the northeast US. Total eclipses are ...
David Hammen's user avatar
  • 34.1k
8 votes

Can emergency blanket material be used for making a homemade solar filter for a digital camera?

NO! Do not do that. It will damage your eyes. They do not offer protection for all wavelength, and might not offer enough attenuation so that too much or invisible radiation penetrates it and WILL ...
planetmaker's user avatar
  • 19.7k
8 votes

What are the best options for watching total or partial solar eclipse during bad weather conditions?

If you stay in the region of partial eclipse on a cloudy day you will probably observe nothing special. Perhaps you might notice that "the clouds are a little darker now than they were ...
James K's user avatar
  • 123k
7 votes

Why is the lunar relief not visible in photographs of solar eclipses?

The picture in the OP is most likely a drawing. You can tell by a cartoon-like look of the corona as well as a similarly sterile solar flare on the right. If you search for actual high-resolution ...
Ruslan's user avatar
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7 votes
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When was the last time a total solar eclipse on Neptune courtesy of Triton occured, and when will be the next?

According to Wikipedia, all of Neptune's inner moons can cause solar eclipses. At that distance, "the Sun's angular diameter is reduced to one and a quarter arcminutes across". Triton has an ...
PM 2Ring's user avatar
  • 14.9k
6 votes
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Is there a maximum practical telescope aperture for viewing (through a filter) a solar eclipse?

If you want to see the entire Sun in a single field of view, your concern is with the magnification and field of view of your eyepiece, rather than overall aperture and focal length. Magnification is ...
antlersoft's user avatar
  • 3,455
6 votes

During a total solar eclipse is it possible to see solar flares with the naked eye?

Although rare, it is possible to see solar prominences with the naked eye during a total solar eclipse. The most recent was in 1991 when two very large prominences were visible to the naked eye during ...
Steve Pemberton's user avatar
6 votes
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Attachment for viewing the sun with a telescope

The device you saw was probably a "solar projection eyepiece". You can use any eyepiece for this, in theory, though eyepieces with cemented lenses can heat up in the sun and the glass can ...
Aaron F's user avatar
  • 1,670
6 votes

How old are the total solar eclipses as we see them today?

Possibly as old as the moon itself - it may be that the moon has never fully occluded the corona. According to this source, shortly after the moon's formation, it would have been close enough to ...
Nuclear Hoagie's user avatar
6 votes

Why is there a year 1 B.C., a year 0, and a year 1 A.D. in NASA’s Five Millennium Canon of Solar Eclipses?

The concept of zero didn't reach western Europe until the 13th century. The concept of zero is a bit heretical (a thing that represents nothing???), but is arguably the most important concept in ...
David Hammen's user avatar
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5 votes
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Using binoculars during solar eclipse totality

Speaking from my experience of the 1999 eclipse visible from southern England, no. Use your naked eyes and commit the experience to memory. I was lucky to see a gap in the clouds that day, many weren'...
Chenmunka's user avatar
  • 218
5 votes

Using binoculars during solar eclipse totality

Well, the Great American Eclipse of 2024 is done, and I wanted to answer my own question with my experience. Here's the equipment I brought. Fujinon 14x40 stabilized binoculars: 4" x 4" ...
Daniel Griscom's user avatar
5 votes
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Visualized shapes of areas of total and partial solar eclipse

There are purpose-made animations for recent eclipses on the NASA pages: 2021 Annular Solar Eclipse. You can download the video, and with a decent player like vlc, you can thus go back and forth. You ...
planetmaker's user avatar
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5 votes
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How to confirm that I am in the center of the path of totality for the Solar Eclipse of April 08 2024 using GPS or Android/Iphone App?

This app should do the trick https://www.space.com/totality-app-big-kid-science-april-total-solar-eclipse-2024 . I tested it on my Amazon Fire tablet and it gives you all the details for any point you ...
Thomas's user avatar
  • 3,494
5 votes

Can emergency blanket material be used for making a homemade solar filter for a digital camera?

The aluminized Mylar of a space blanket is not subject to the same quality controls as solar filters. In particular, it may have pinholes that create pinhole burns on your retina, and it may have ...
Mark's user avatar
  • 3,393

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