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Is it possible that the shadow of the moon is a single dot during solar eclipse?
Why does the darkening of the Moon go from left-to-right during an eclipse?Red Moon a Characteristic of all Total Lunar Eclipses?Why does the eclipse in this video look annular?How Soon Could a Waxing Crescent Moon Be Seen?Solar Telescope Projector Screen? [& intro telescope for solar eclipse]Can Astronauts Aboard ISS See the Shadow of The Moon on The Earth During an Eclipse?Mountains on the moon during solar eclipse?What is a “semester series” for eclipse prediction? - Solar saros series 147 and 152Why can't we observe a solar eclipse and the preceding/following lunar eclipse from the same place?When did the first annular eclipse happen?
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$begingroup$
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 the Earth but could there have been a time that the shadow area was just a dot. (probably for just some places as the Earth is not really perfect a sphere and the orbit of the moon isn't also a perfect circle).
the-moon solar-eclipse
asked 8 hours ago
Marijn Marijn
7506 silver badges17 bronze badges
$endgroup$
add a comment
|
$begingroup$
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 the Earth but could there have been a time that the shadow area was just a dot. (probably for just some places as the Earth is not really perfect a sphere and the orbit of the moon isn't also a perfect circle).
the-moon solar-eclipse
asked 8 hours ago
Marijn Marijn
7506 silver badges17 bronze badges
$endgroup$
$begingroup$
There are annular solar eclipses even today. So it is possible, it is probably a far rarer event than a total eclipse, but possible. But what would be interesting in it? It would only result, that only on a single point of the Earth do we have a total eclipse.
$endgroup$
– peterh
7 hours ago
$begingroup$
Sun is not a point source.
$endgroup$
– Wayfaring Stranger
1 hour ago
add a comment
|
$begingroup$
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 the Earth but could there have been a time that the shadow area was just a dot. (probably for just some places as the Earth is not really perfect a sphere and the orbit of the moon isn't also a perfect circle).
the-moon solar-eclipse
asked 8 hours ago
Marijn Marijn
7506 silver badges17 bronze badges
$endgroup$
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 the Earth but could there have been a time that the shadow area was just a dot. (probably for just some places as the Earth is not really perfect a sphere and the orbit of the moon isn't also a perfect circle).
the-moon solar-eclipse
the-moon solar-eclipse
asked 8 hours ago
Marijn Marijn
7506 silver badges17 bronze badges
asked 8 hours ago
Marijn Marijn
7506 silver badges17 bronze badges
asked 8 hours ago
Marijn Marijn
7506 silver badges17 bronze badges
asked 8 hours ago
Marijn Marijn
7506 silver badges17 bronze badges
asked 8 hours ago
Marijn Marijn
7506 silver badges17 bronze badges
7506 silver badges17 bronze badges
$begingroup$
There are annular solar eclipses even today. So it is possible, it is probably a far rarer event than a total eclipse, but possible. But what would be interesting in it? It would only result, that only on a single point of the Earth do we have a total eclipse.
$endgroup$
– peterh
7 hours ago
$begingroup$
Sun is not a point source.
$endgroup$
– Wayfaring Stranger
1 hour ago
add a comment
|
$begingroup$
There are annular solar eclipses even today. So it is possible, it is probably a far rarer event than a total eclipse, but possible. But what would be interesting in it? It would only result, that only on a single point of the Earth do we have a total eclipse.
$endgroup$
– peterh
7 hours ago
$begingroup$
Sun is not a point source.
$endgroup$
– Wayfaring Stranger
1 hour ago
$begingroup$
There are annular solar eclipses even today. So it is possible, it is probably a far rarer event than a total eclipse, but possible. But what would be interesting in it? It would only result, that only on a single point of the Earth do we have a total eclipse.
$endgroup$
– peterh
7 hours ago
$begingroup$
There are annular solar eclipses even today. So it is possible, it is probably a far rarer event than a total eclipse, but possible. But what would be interesting in it? It would only result, that only on a single point of the Earth do we have a total eclipse.
$endgroup$
– peterh
7 hours ago
$begingroup$
Sun is not a point source.
$endgroup$
– Wayfaring Stranger
1 hour ago
$begingroup$
Sun is not a point source.
$endgroup$
– Wayfaring Stranger
1 hour ago
add a comment
|
2 Answers
2
active
oldest
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$begingroup$
What you are calling a focal point is the end of the umbra, the point at which the umbra changes to the antumbra. In a total solar eclipse, that point is below rather than above the surface of the Earth. An annular eclipse occurs when that point is above the surface of the Earth. The Moon appears to be smaller than the Sun, leaving an unbroken ring of the Sun that appears to surround the Moon.
There are some solar eclipses that transition from annular to total, and from total to annular. A point on the surface of the Earth is exactly at the end of the umbra at those times of transition points in time. At this point in space and time the Moon will appear to be exactly the same size as and exactly in line with the Sun.
answered 4 hours ago
David HammenDavid Hammen
12.4k1 gold badge19 silver badges52 bronze badges
$endgroup$
add a comment
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$begingroup$
As the Moon's eccentric orbit around the Earth brings it nearer and farther, current solar eclipses can be total or annular.
A few in between are
hybrid eclipses: total along the midday part of the path, and annular near the sunrise or sunset end.
This happens mostly due to the Earth's surface curvature and partly due to the Moon's orbital eccentricity.
At an annular/total transition point, the
eclipse magnitude
is 1.00, and an observer would see a "diamond ring" flip from one side to the other.
Hybrid eclipses occurred on
2013-11-03
and will occur on
2023-04-20.
answered 4 hours ago
Mike GMike G
8,2541 gold badge10 silver badges31 bronze badges
$endgroup$
add a comment
|
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
What you are calling a focal point is the end of the umbra, the point at which the umbra changes to the antumbra. In a total solar eclipse, that point is below rather than above the surface of the Earth. An annular eclipse occurs when that point is above the surface of the Earth. The Moon appears to be smaller than the Sun, leaving an unbroken ring of the Sun that appears to surround the Moon.
There are some solar eclipses that transition from annular to total, and from total to annular. A point on the surface of the Earth is exactly at the end of the umbra at those times of transition points in time. At this point in space and time the Moon will appear to be exactly the same size as and exactly in line with the Sun.
answered 4 hours ago
David HammenDavid Hammen
12.4k1 gold badge19 silver badges52 bronze badges
$endgroup$
add a comment
|
$begingroup$
What you are calling a focal point is the end of the umbra, the point at which the umbra changes to the antumbra. In a total solar eclipse, that point is below rather than above the surface of the Earth. An annular eclipse occurs when that point is above the surface of the Earth. The Moon appears to be smaller than the Sun, leaving an unbroken ring of the Sun that appears to surround the Moon.
There are some solar eclipses that transition from annular to total, and from total to annular. A point on the surface of the Earth is exactly at the end of the umbra at those times of transition points in time. At this point in space and time the Moon will appear to be exactly the same size as and exactly in line with the Sun.
answered 4 hours ago
David HammenDavid Hammen
12.4k1 gold badge19 silver badges52 bronze badges
$endgroup$
add a comment
|
$begingroup$
What you are calling a focal point is the end of the umbra, the point at which the umbra changes to the antumbra. In a total solar eclipse, that point is below rather than above the surface of the Earth. An annular eclipse occurs when that point is above the surface of the Earth. The Moon appears to be smaller than the Sun, leaving an unbroken ring of the Sun that appears to surround the Moon.
There are some solar eclipses that transition from annular to total, and from total to annular. A point on the surface of the Earth is exactly at the end of the umbra at those times of transition points in time. At this point in space and time the Moon will appear to be exactly the same size as and exactly in line with the Sun.
answered 4 hours ago
David HammenDavid Hammen
12.4k1 gold badge19 silver badges52 bronze badges
$endgroup$
What you are calling a focal point is the end of the umbra, the point at which the umbra changes to the antumbra. In a total solar eclipse, that point is below rather than above the surface of the Earth. An annular eclipse occurs when that point is above the surface of the Earth. The Moon appears to be smaller than the Sun, leaving an unbroken ring of the Sun that appears to surround the Moon.
There are some solar eclipses that transition from annular to total, and from total to annular. A point on the surface of the Earth is exactly at the end of the umbra at those times of transition points in time. At this point in space and time the Moon will appear to be exactly the same size as and exactly in line with the Sun.
answered 4 hours ago
David HammenDavid Hammen
12.4k1 gold badge19 silver badges52 bronze badges
answered 4 hours ago
David HammenDavid Hammen
12.4k1 gold badge19 silver badges52 bronze badges
answered 4 hours ago
David HammenDavid Hammen
12.4k1 gold badge19 silver badges52 bronze badges
answered 4 hours ago
David HammenDavid Hammen
12.4k1 gold badge19 silver badges52 bronze badges
12.4k1 gold badge19 silver badges52 bronze badges
add a comment
|
add a comment
|
$begingroup$
As the Moon's eccentric orbit around the Earth brings it nearer and farther, current solar eclipses can be total or annular.
A few in between are
hybrid eclipses: total along the midday part of the path, and annular near the sunrise or sunset end.
This happens mostly due to the Earth's surface curvature and partly due to the Moon's orbital eccentricity.
At an annular/total transition point, the
eclipse magnitude
is 1.00, and an observer would see a "diamond ring" flip from one side to the other.
Hybrid eclipses occurred on
2013-11-03
and will occur on
2023-04-20.
answered 4 hours ago
Mike GMike G
8,2541 gold badge10 silver badges31 bronze badges
$endgroup$
add a comment
|
$begingroup$
As the Moon's eccentric orbit around the Earth brings it nearer and farther, current solar eclipses can be total or annular.
A few in between are
hybrid eclipses: total along the midday part of the path, and annular near the sunrise or sunset end.
This happens mostly due to the Earth's surface curvature and partly due to the Moon's orbital eccentricity.
At an annular/total transition point, the
eclipse magnitude
is 1.00, and an observer would see a "diamond ring" flip from one side to the other.
Hybrid eclipses occurred on
2013-11-03
and will occur on
2023-04-20.
answered 4 hours ago
Mike GMike G
8,2541 gold badge10 silver badges31 bronze badges
$endgroup$
add a comment
|
$begingroup$
As the Moon's eccentric orbit around the Earth brings it nearer and farther, current solar eclipses can be total or annular.
A few in between are
hybrid eclipses: total along the midday part of the path, and annular near the sunrise or sunset end.
This happens mostly due to the Earth's surface curvature and partly due to the Moon's orbital eccentricity.
At an annular/total transition point, the
eclipse magnitude
is 1.00, and an observer would see a "diamond ring" flip from one side to the other.
Hybrid eclipses occurred on
2013-11-03
and will occur on
2023-04-20.
answered 4 hours ago
Mike GMike G
8,2541 gold badge10 silver badges31 bronze badges
$endgroup$
As the Moon's eccentric orbit around the Earth brings it nearer and farther, current solar eclipses can be total or annular.
A few in between are
hybrid eclipses: total along the midday part of the path, and annular near the sunrise or sunset end.
This happens mostly due to the Earth's surface curvature and partly due to the Moon's orbital eccentricity.
At an annular/total transition point, the
eclipse magnitude
is 1.00, and an observer would see a "diamond ring" flip from one side to the other.
Hybrid eclipses occurred on
2013-11-03
and will occur on
2023-04-20.
answered 4 hours ago
Mike GMike G
8,2541 gold badge10 silver badges31 bronze badges
answered 4 hours ago
Mike GMike G
8,2541 gold badge10 silver badges31 bronze badges
answered 4 hours ago
Mike GMike G
8,2541 gold badge10 silver badges31 bronze badges
answered 4 hours ago
Mike GMike G
8,2541 gold badge10 silver badges31 bronze badges
8,2541 gold badge10 silver badges31 bronze badges
add a comment
|
add a comment
|
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$begingroup$
There are annular solar eclipses even today. So it is possible, it is probably a far rarer event than a total eclipse, but possible. But what would be interesting in it? It would only result, that only on a single point of the Earth do we have a total eclipse.
$endgroup$
– peterh
7 hours ago
$begingroup$
Sun is not a point source.
$endgroup$
– Wayfaring Stranger
1 hour ago