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They occur about once a year. Called perigee-syzygy or perigee moons by the astronomical community, they occur when a full or new moon (syzygy) is closest in its orbit to the earth (perigee), when the sun, earth and moon are aligned.
A lunar eclipse (eclipse of the moon) can occur only at the time of the Full Moon. A solar eclipse (eclipse of the sun) can occur only at the time of New Moon.
A supermoon is a full moon (or a new moon) that nearly coincides with perigee—the closest that the Moon comes to the Earth in its elliptic orbit—resulting in a slightly larger-than-usual apparent size of the lunar disk as viewed from Earth. The technical name is a perigee syzygy or a full Moon around perigee.
The moon is said to be at its Perigee when at its closest point to the Earth, Apogee when at its furthest point. Perigee and Apogee can also be used for other objects when orbiting about the Earth. If we talk about objects orbiting the sun (such as the planets) we use the term Perihelion and Aphelion (the helion part coming from the latin name of helios for the sun). If the perigee coincides with a full moon, we get a `supermoon`. The moon is at its largest circumference as it is at its closest, and is also full.
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They occur about once a year. Called perigee-syzygy or perigee moons by the astronomical community, they occur when a full or new moon (syzygy) is closest in its orbit to the earth (perigee), when the sun, earth and moon are aligned.
"Supermoon" is the recent hyperbole term for the perigee full moon. The Moon's orbit around the Earth is an ellipse; all orbits are ellipses. When the full moon happens at or around the time of perigee (closest point of approach to the Earth), the Moon appears to be about 10% bigger and brighter than it would appear when the full moon is at apogee (farthest point from the Earth). Perigee full moons happen every year, so the term "supermoon" is silly.
The closest the Moon gets to Earth is it perigee which is:-363,104 km225 622 Miles0.0024 AU
Solar eclipse happens when shadow of moon falls on sun. Solar eclipse cannot happen on full moon day because on full moon day earth is in between Sun and Moon and hence moon cannot cast shadow on sun.
The "super moon", more accurately known as the "perigee full moon", happens when the time of the full moon corresponds pretty closely to the time of perigee, the Moon's closest approach to the Earth. The Moon's orbit isn't circular; no natural orbits are circular. All orbits are elliptical, sort of oval. The full moon happens at perigee - or pretty close - every year. This year, the Moon is almost exactly at perigee for the August full moon, but is just before perigee for July, and just after perigee in September. So each of these full moons will be larger than average. The perigee full moon looks about 11% larger than an apogee (farthest from Earth) full moon. It won't really be "super"; that's the fluff-headed news reporters who know nothing about science. But it'll be pretty. Go outside and look east just at sunset.
Tonight's full moon will be the brightest this year, but not QUITE as bright as the full moon last month. Last month and this month, we have a "perigee moon", when the full moon corresponds to the closest point in the Earth's orbit. The "perigee full moon" appears about 15% larger and 30% brighter than the "average" full moon.
A lunar eclipse is caused when the shadow of the Earth hits the Moon. This can only happen when the Moon is entirely full.
The Moon is in orbit around the Earth. All orbits are elliptical, meaning oval-shaped; no orbits are perfect circles. When it is at "apogee", or the farthest distance from the Earth, the Moon is about 250,000 miles distant. At "perigee", or the closest distance to the Earth, the Moon is about 225,000 miles away. It does this EVERY MONTH. Because the Earth is orbiting the Sun and the Moon orbits the Earth, there's one particular time of year at which the lunar perigee happens to coincide with the full moon; this is called the "perigee full moon", although some writers who are desperate for headlines have started to call this the "super moon". The "super moon", or "perigee full moon" for 2012 happened last night (as I write this on May 6, 2012). It will happen again next year.
All night. The proper term is "perigee full moon" , and it happens every 15 years or so when the full moon happens to coincide with the Moon's "perigee", or closest point of approach to the Earth. This one isn't anything particularly special.
The lunar eclipse can only happen when the moon is full.
All night. The proper term is "perigee full moon" , and it happens every 15 years or so when the full moon happens to coincide with the Moon's "perigee", or closest point of approach to the Earth. This one isn't anything particularly special.
A lunar eclipse (eclipse of the moon) can occur only at the time of the Full Moon. A solar eclipse (eclipse of the sun) can occur only at the time of New Moon.