Questions tagged [solar-eclipse]

Questions about the complete or partial blocking of the sun by the moon.

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Is it possible to block the surrounding light in a solar eclipse if we made the moon bigger or closer to the earth?

Is it possible to block the surrounding light in a solar eclipse if we made the moon bigger or closer to the earth? In an eclipse, you always see a ring of light surrounding the moon, but I am ...
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Do the Sun's rays get focused at or near the L1 Lagrangian point?

I have seen so many schematic pictures of eclipses (solar and lunar), and in all of them, the Sun's rays are focused at a specific point (left of the Earth in lunar eclipses and a slightly left of the ...
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5 votes
0 answers
133 views

Is it possible to narrow down possible dates for the following eclipse pattern?

I am searching for an year which satisfies the following criteria. Dates are in Gregorian calendar. Criteria Year range 3800 BC to 500 BC Solar Eclipse of any kind between October 14 and October 22 ...
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7 votes
2 answers
2k views

Why aren't there eclipses every month when the moon's orbit is aligned with the ecliptic as a result of lunar precession?

I can understand why we don't have eclipses every month when the inclinations of the ecliptic plane and the moon's orbital plane are different. But the inclination of the moon's orbital plane changes ...
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2 votes
2 answers
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Why does the difference between terrestrial times and universal time, $\Delta T$, have such a strange behaviour?

I was reading about ancient astronomy, and one of the main phenomena described is eclipses. Now, I read this 2016 paper by Stephenson, Morrison and Hohenkerk, in which they determine the values of the ...
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Solar planets' aphelion longitudes in 2021?

What is the ecliptic longitude of the aphelion of each of the solar planets (Moon, Mercury, Venus, Earth, Mars, Jupiter, Saturn) currently in 2021 and from the observer's point of view on the earth? ...
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2 votes
1 answer
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When could solar eclipse happen in a way that Sun's disk is diminishing from below?

I'm trying to solve this task: During a solar eclipse, an observer noticed that the diminishment of the Sun's disk began directly from below. Where and when could this be? Concerning "where&...
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3 votes
1 answer
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Could there be an eclipse tomorrow if the Pleiades is covered by the Moon tonight?

I'm trying to solve this task: Suppose today there is a covering of the Pleiades star cluster by the Moon. Could there be an eclipse of the sun tomorrow? The moon? I think the answer to both is no, ...
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5 votes
2 answers
331 views

How to calculate eclipses on a planet in a binary star system

I posted this question on the physics page but decided it might be best if I post it here instead as it may be a more astronomy related question. I also haven't received any answers over there so far ...
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3 answers
454 views

How to find the the diameter of the moon during a total solar eclipse?

I am not able to find the diameter of the moon. I have the following question in my physics textbook: During a total solar eclipse the moon almost entirely covers the sphere of the sun. Write the ...
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1 vote
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Is it safe to look at an annular eclipse during sunrise using a medium

will looking at annular eclipse reflection through a bowl of water damage your sight? i already tried viewing it reflection through a bowl of water.
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3 votes
2 answers
193 views

Sun traveling North & South in this graphic?

"CBS This Morning" showed this graphic for the 2024 Eclipse that will be seen from America. I would have expected a solar eclipse to follow an East to West path across the USA since, at ...
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1 answer
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Is it safe to look at an annular eclipse during sunrise? [duplicate]

I'm lucky enough to be where an annular eclipse will happen at the same time as sunrise. Usually, it's dangerous to look at an eclipse directly. However, the sun appears much less bright at sunrise. ...
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0 votes
1 answer
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Safety while using a telescope to view a total solar eclipse

I have an 8-inch reflector telescope and a solar filter that goes on the front aperture to view the Sun (most recently to view the transit of Mercury). If I were to use this telescope during a total ...
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2 votes
0 answers
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What is the probability of having a solar eclipse on a planet?

If we go by our planets 5/8 of our planets have solar eclipses. What is the probability of a planet having a solar eclipse based off other simulations? Is there a more accurate way to calculate the ...
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-3 votes
4 answers
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What’s an Earth-Sun-Moon eclipse called?

I understand we would all die and this is a common “think about your question before you ask it” thing in high school, but what would we call an eclipse where the Sun gets in between Earth and the ...
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1 answer
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How much dimmer is a partial solar eclipse that goes from -26.71 to -25.89?

Based on what I found in Stellarium, for Vlissingen, Netherlands, on July 2, 1666 there was a partial eclipse with a change of apparent brightness -26.71 to -25.89. Is it valid to say based on the ...
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4 votes
1 answer
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Why is solar corona in visible light filamentary?

There is a video on YouTube (unfortunately in Czech) where Miloslav Druckmüller talks about structure of the solar corona in visible light. He explains that the filaments, clearly visible on his ...
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4 votes
2 answers
152 views

How long do other planets in our solar system have total solar eclipses?

Jupiter, Saturn, Uranus and Neptune — can all have total solar eclipses so how long do they last? https://www.livescience.com/amp/60037-do-other-planets-have-solar-eclipses.html
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4 votes
1 answer
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What is the duration of the era during which it will be possible to perceive a total solar eclipse?

Total solar eclipses occur because the Moon and the Sun have the same apparent size in Earth's sky — the Sun is about 400 times wider than the Moon, but the Moon is about 400 times closer. It's my ...
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24 votes
2 answers
5k views

Can a planet in our system eclipse the sun as seen from another one?

When the Sun, Earth and Moon get properly aligned, we get eclipses, where the Sun is partially or totally hidden by the Moon when seen from Earth. Is it possible for one planet of the solar system to ...
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2 votes
1 answer
126 views

When does a solar eclipse become noticeable?

For a human viewer located on Earth, is there an approximate apparent magnitude at which a solar eclipse becomes apparent in the form of a noticeable change in ambient brightness? Assume normal ...
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1 answer
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How accurate is Stellarium at depicting the Earth, from the Moon, approaching a solar eclipse (from Lunar perspective)?

This is how Stellarium depicts the positions of the Earth and Sun 24 hours before the solar eclipse (from Lunar perspective) on Jan. 13, 2131 A close up of the Earth on that day (Jan 12) shows no ...
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3 votes
1 answer
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How to calculate the point on the globe with maximum magnitude with given Besselian elements and given time for a partial solar eclipse?

I am currently working on improvement of an Android app that calculates solar eclipses. For many days now I have not been able to solve a mathematical problem concerning solar eclipses, so I decided ...
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3 votes
1 answer
100 views

How much of the Sun's disk must be covered for a visible shadow to be cast?

At first it seems like the answer is obvious, $100$% or more, that's what a total solar eclipse is after all. But after seeing satellite images of the June 21st 2020 annular eclipse, the shadow cast ...
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3 votes
1 answer
173 views

How did DSCOVR capture the Moon's shadow on Earth during the August 21 2017 solar eclipse without the Moon itself also being visible?

In this gif you can clearly see the Moon's shadow moving from the West Coast of the U.S. towards the East Coast during the August 21 2017 eclipse. DSCOVR (the satellite that imaged this) is located at ...
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1 vote
0 answers
101 views

Calculating Solar eclipse magnitude with the besselian elements

Calculating Solar eclipse magnitude with the besselian elements What is the mathematic formula for calculating the magnitude of a solar eclipse using Besselian elements?
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13 votes
3 answers
5k views

Will just a glimpse (less than a second) of sun during partial solar eclipse damage eyes?

This doubt arose when I thought that on Normal Days, at least I have observed bright sun while going outside, going to office, in park etc. for less than a second. It happens almost daily. Not ...
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4 votes
3 answers
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Apparently two objects in Solar Eclipse image

These images are taken from a mobile camera of 21 June 2020 solar eclipse. So the thing surprising me is there are two objects. I have shown these images to some people. Some says it's just reflection ...
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2 votes
1 answer
46 views

What are the Kinematics / Dynamics behind the motion?

https://www.timeanddate.com/eclipse/in/@8133395?iso=20200621 The link I have attached is a predicted model for the eclipse in my area! I am very much confused about the movement of the moon analogous ...
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1 vote
1 answer
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Can a single location on earth witness solar eclipse totality 2 times during a single eclipse event?

The question came to my mind when I saw a visualisation of the path of the moon (relative to the sun - the sun is kept centered in the graphic, and only the moon moves) as its seen from a particular ...
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5 votes
3 answers
1k views

Why doesn't the moon always follow the same path? Or why aren't the moon's apoapsis and periapsis fixed?

I have seen many times that the moon doesn't follow the same path. Sometimes the moon gets very close to earth which is shown in the news. If the periapsis of the moon is soo close then why doesn't a ...
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54 votes
5 answers
6k views

Why does Io cast a hard shadow on Jupiter, but the Moon casts a soft shadow on Earth?

Io (source): The Moon (source):
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6 votes
3 answers
149 views

Can lunar occultation of Venus occur during solar eclipse?

Moon can occult Venus. Venus can transit across the solar disc. Moon can elipse Sun. Can all three celestial events occur at the same time - Moon is at front of Sun (partial eclipse is fine) and Venus ...
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1 vote
3 answers
264 views

Moon’s orbit shift

Has our moon’s orbit shifted since its formation? Has there been eclipses on the Earth since last ~4 billion years? In other words, was there a time when Moon's orbit was at an inclination to Earth's ...
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14 votes
3 answers
3k views

Why can't we see a solar eclipse every month?

In every lunar revolution around Earth, the Moon is at a point between the Earth and the Sun. Then why can't we see a solar eclipse once every lunar month? Is it because of a tilted orbit of the Moon ...
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4 votes
1 answer
118 views

How accurate should sun\moon ephemeris be for calculating eclipses?

I am writing a program to simulate eclipses for about -2000 to 6000. My question is, how accurate does my ephemeris for the sun and moon have to be to get a decent accuracy for eclipses? I currently ...
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18 votes
3 answers
5k views

During an eclipse, how big is the shadow of the moon on the earth?

This picture was taken from the ISS during a solar eclipse. You can see the shadow of the Moon on the surface of the Earth. But how big is this shadow? How many kilometers is its diameter?
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18 votes
1 answer
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Was the Sun's gravitational lensing observed in other solar eclipses than the one in 1919?

In 1919 the gravitational lensing by the Sun has been observed during a total solar eclipse. Did someone observe the lensing in any other total eclipses? Last year there was a total eclipse in Chile ...
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1 vote
2 answers
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Do all total solar eclipses have the ring of fire when observed from ground?

I was recording the phenomenon and then I soon realised that the ring of fire don't dissappear, is it because of the apparent size of the moon and sun as well as the relative distance so that every ...
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11 votes
3 answers
539 views

Is it possible to see mercury transit "clearly" by the naked eye?

I don't have a telescope but I'm interested in seeing events like eclipses and transits. I'll use the atmosphere as my big natural lens. So I'll watch the upcoming mercury transit at the sunset time ...
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14 votes
3 answers
7k views

Is it possible that the shadow of The Moon is a single dot during solar eclipse?

During a solar eclipse The Moon covers The Sun on some places on the Earth. Now the focal point is a bit above the Earth so the shadow area is about 160 miles. In history The Moon was a bit closer to ...
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9 votes
1 answer
383 views

When did the first annular eclipse happen?

A few hundreds of millions of years ago, the moon was closer to the Earth than it is today and hence was of a bigger apparent size. This made every solar eclipse either total or partial. Over the ...
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3 votes
1 answer
824 views

Why can't we observe a solar eclipse and the preceding/following lunar eclipse from the same place?

Lunar and solar eclipses go in tandem so the two often happens two weeks apart. However I noticed if there is a solar eclipse in my area then the preceding/following lunar eclipse is not visible from ...
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1 vote
0 answers
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evaluate solar eclipse Besselian elements? [closed]

I found this NASA website which says that to predict eclipse, we should solve the Besselian elements ..what does this mean, how can I solve for Besselian elements? Is there a numerical method? I need ...
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2 votes
0 answers
318 views

Stellarium software with DE431 for eclipse 10000 yrs ago

Hi I am a novice in the field of astronomy. I want to find out the dates for lunar and solar eclipse 9000-11000 yrs ago. I found out that Stellarium is based on VSOP87 which is recommended for 4000 ...
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4 votes
3 answers
151 views

How to properly observe Solar Total Eclipse in 2019?

I live in South America and I'm willing to travel to Chile in July 2019 to observe (in a curious way, not professional) the Solar Total Eclipse. According to my research, one of the best cities to ...
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4 votes
2 answers
264 views

Why is only a narrow chunk of sky darkened in this amazing Curiosity solar eclipse GIF from Mars?

I found three NASA JPL images in the sequence PIA23133, PIA23134, and PIA23135. They were taken by the Curiosity Rover on Mars and show solar eclipses by Mars' two moons. Details of these images are ...
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2 votes
0 answers
52 views

Was NASA's 2007 attempt to see helions during a solar eclipse successful? What instruments were used?

This answer about Sun-grazing comets led me eventually to Wikipedia's Helion (meteoroid), which has a one-sentence long article: A Helion meteoroid is a meteoroid that arrives from the approximate ...
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2 votes
0 answers
40 views

Last possible total solar elipse in the Earth's history [duplicate]

So the Moon is drifting away from Earth by 3.8 cm a year due to tidal interactions. With the Moon slowly receding from Earth, there will come a time when it no longer has sufficient angular size to ...
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