There are two equinoxes evry year, in September and March, and a year passes between one vernal equinox and the next (in either hemisphere).
Pretty much, yes. You have the spring (vernal) and autumn (autumnal) equinoxes, so it's around that time. Midsummer's day is around the first day of summer. But the equinoxes aren't precisely (to the smallest fraction of a second) halfway between, because the velocity of earth's orbit is constantly changing throughout the year.
On average, each sunspot cycle takes about 11 years. Some are longer, and some shorter.
It really depends if it is Spring, Summer, Fall, or Winter. When it is winter, the nights are much longer. When it is summer, the nights are much shorter. When it is Spring or Fall, the night time'will be as long as the day simply because of the Equinox.
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There are two tools that astronomers use to determine that a far-off star has planets. 1. Occultation: When a planet passes in between the Earth and another star, it is called an "occultation", from the Latin word "occult" or "hidden". The light measurement from the star will be slightly decreased when a planet passes in front of the star. Think of it as a very par away eclipse. This only works for very large planets. 2. Gravitational "wobble": A large planet attracts a star as much as the star attracts the planet, and they both orbit their joint center of gravity. Because the star is so much more massive than the planet, the star only wobbles very slightly, but over long periods it is possible to notice the differences.
You gain daylight after the spring equinox how much depends on your latitude .
A tropical year, which is a year based on season and is about 20 minute shorter than a sidereal year (based on localization of star).
Yes, pretty much so. On the Equinox (which happens to be today, March 20, 2014) there is exactly 12 hours between sunrise and sunset. Bear in mind that it's light enough to see for a few minutes before sunrise and a few minutes after sunset, so it SEEMS like the day is a bit longer than the night - but they are equal. That's what "equinox" means; "equal nights".
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Equinox has 1800 HP.
29.5 days.
One season cycle typically lasts around 3 months, with each season - spring, summer, autumn, and winter - lasting approximately 3 months each.
The 2010 Chevrolet Equinox requires 5 quarts of oil.
Pretty much, yes. You have the spring (vernal) and autumn (autumnal) equinoxes, so it's around that time. Midsummer's day is around the first day of summer. But the equinoxes aren't precisely (to the smallest fraction of a second) halfway between, because the velocity of earth's orbit is constantly changing throughout the year.
the 2005 Chevy equinox holds 5 quarts of oil
the zygote helps it repouduce
It is a variable. The eruptions of a volcano are not regular.