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What are the two points on the ecliptic which the sun is farthest from the celestial equator?
Wiki User
∙ 14y ago
Those are the two solstices. The sun appears to pass the southern one
around December 21 each year, and the northern one around June 21.
Wiki User
∙ 13y ago
Wiki User
∙ 14y agoThe Summer Solstice and the Winter Solstice.
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The sun is on the celestial equator at the times of the?
The equinoxes are the two points on the celestial equator there the ecliptic(the sun's apparent annual path through the stars) crosses it.Note that the equinoxes are not events or dates. They are points on the mapof the stars.
What is the origin of the word 'equinox'?
1) Either of two times of the year when the sun crosses the plane of the earth's equator and day and night are of equal length 2) (astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic known as equinox yash patel
Where would the ecliptic be in the northern hemisphere?
This is difficult to describe in text, without sketches, but I'll try: -- First, the 'equator' of the sky: That's a line all around the sky that's exactly over the Earth's equator. In your sky, wherever you are, this 'celestial' equator is a semi-circle from the exactly-east point on your horizon to the exactly-west point. Its highest point is due south of you, and at that point, its height above your southern horizon is (90 degrees minus your latitude). If you're on the equator, then the celestial equator passes right over your head. If you're at the north pole, then the celestial equator coincides with your horizon. If you're in Minneapolis, Salem OR, Bangor, Grenoble, Torino, or Belgrade, at 45° north latitude, then it passes 45° above your south horizon. -- The highest of the 3 stars in Orion's belt is on the celestial equator. -- The ecliptic is another line all the way around the sky. It crosses the celestial equator at two places, and it's tilted 231/2 degrees to the equator. So half of the ecliptic is above (north) of the equator, and the other half of it is below the sky's equator. -- Through the day, as the Earth turns, one of the two points where the ecliptic crosses the equator will be in your sky at any one time. The ecliptic will appear high in your sky for half of the day, and low in the sky for the other half. The point where it crosses directly south of you will wiggle up and down through a total of 47 degrees in 24 hours. -- The left pincher of Scorpius and the heart of Leo (Regulus) are on the ecliptic. The eye of Taurus (Aldeberan) is not too far off of it. The ecliptic is actually the line where the plane of Earth's orbit cuts through the 'bowl' of the sky. Some of the results are: -- The sun is always on the ecliptic. -- The planets are always close to the ecliptic. Now, in mid-2013, Jupiter is smack on it. -- The moon is always within about 51/2 degrees of the ecliptic. -- In Summer, the sun is high, so the ecliptic ... with the moon and planets ... is low during the night. -- In Winter, the sun is low, so the ecliptic ... with the moon and planets ... is high during the night. Remember those two points where the ecliptic crosses the celestial equator ? Those points in the sky are the 'equinoxes'. Those points are where the sun is on March 21 and September 21.
What is a stars location determined by?
Astronomers use the coordinate system of RA right ascension also called hour angle, and Declination (Dec)RA is the celestial equivalent of terrestrial longitude. Both RA and longitude measure an east-west angle along the equator; and both measure from a zero point on the equator. For longitude, the zero point is the Prime Meridian; for RA, the zero point is known as the First Point of Aries, which is the place in the sky where the Sun crosses the celestial equator at the March equinox. RA is always zero on the meridian of the celestial sphere which passes through the celestial poles and first point of Aries. Declination is comparable to latitude, projected onto the celestial sphere, and is measured in degrees north and south of thecelestial equator. Therefore, points north of the celestial equator have positive declinations, while those to the south have negative declinations. * An object on the celestial equator has a dec of 0°. * An object at the celestial north pole has a dec of +90°. * An object at the celestial south pole has a dec of −90°.
When does the moon cross the earth's equator?
The Moon never crosses the equator because the equator is on the surface of the Earth. The Moon does cross the plane in which the equator lies (called the celestial equator).The ascending node and descending node are points at which the Moon's orbit crosses the celestial equator (the plane of the Earths equator). The Moon crosses the same node every 27.2122 days, an interval called the draconicordraconitic month. The line of nodes, the intersection between the two respective planes, has a retrograde motion: for an observer on Earth it rotates westward along the ecliptic with a period of 18.60 years, or 19.3549° per year. When viewed from celestial north, the nodes move clockwise around the Earth, opposite the Earth's own spin and its revolution around the Sun. Lunar and solar eclipses can occur when the nodes align with the Sun, roughly every 173.3 days.Different Answer:The moon will appear to 'cross' the equator twice each lunar month as it moves from south to north (this happens about every 14 days).
The intersection points between the ecliptic and the celestial equator are called?
Those would be the "equinoxes".
The sun is on the celestial equator at the times of the?
The equinoxes are the two points on the celestial equator there the ecliptic(the sun's apparent annual path through the stars) crosses it.Note that the equinoxes are not events or dates. They are points on the mapof the stars.
What are the two points at which the sun is farthest from the celestial equator?
june 21 december 21
How do you find celestial points?
You measure the angles from east from the first point of Aries (which is the place in the sky where the Sun crosses the celestial equator at the March equinox) and north from the ecliptic (declination).
What is the origin of the word 'equinox'?
1) Either of two times of the year when the sun crosses the plane of the earth's equator and day and night are of equal length 2) (astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic known as equinox yash patel
Where would the ecliptic be in the northern hemisphere?
This is difficult to describe in text, without sketches, but I'll try: -- First, the 'equator' of the sky: That's a line all around the sky that's exactly over the Earth's equator. In your sky, wherever you are, this 'celestial' equator is a semi-circle from the exactly-east point on your horizon to the exactly-west point. Its highest point is due south of you, and at that point, its height above your southern horizon is (90 degrees minus your latitude). If you're on the equator, then the celestial equator passes right over your head. If you're at the north pole, then the celestial equator coincides with your horizon. If you're in Minneapolis, Salem OR, Bangor, Grenoble, Torino, or Belgrade, at 45° north latitude, then it passes 45° above your south horizon. -- The highest of the 3 stars in Orion's belt is on the celestial equator. -- The ecliptic is another line all the way around the sky. It crosses the celestial equator at two places, and it's tilted 231/2 degrees to the equator. So half of the ecliptic is above (north) of the equator, and the other half of it is below the sky's equator. -- Through the day, as the Earth turns, one of the two points where the ecliptic crosses the equator will be in your sky at any one time. The ecliptic will appear high in your sky for half of the day, and low in the sky for the other half. The point where it crosses directly south of you will wiggle up and down through a total of 47 degrees in 24 hours. -- The left pincher of Scorpius and the heart of Leo (Regulus) are on the ecliptic. The eye of Taurus (Aldeberan) is not too far off of it. The ecliptic is actually the line where the plane of Earth's orbit cuts through the 'bowl' of the sky. Some of the results are: -- The sun is always on the ecliptic. -- The planets are always close to the ecliptic. Now, in mid-2013, Jupiter is smack on it. -- The moon is always within about 51/2 degrees of the ecliptic. -- In Summer, the sun is high, so the ecliptic ... with the moon and planets ... is low during the night. -- In Winter, the sun is low, so the ecliptic ... with the moon and planets ... is high during the night. Remember those two points where the ecliptic crosses the celestial equator ? Those points in the sky are the 'equinoxes'. Those points are where the sun is on March 21 and September 21.
What is happarchus best known for?
Hipparchus is best known for his discovery of the precessional movement of the equinoxes. The alterations of the measured positions of the stars resulting from the movement of the points of intersection of the ecliptic and of the celestial equator.
What is the angular tilt between the ecliptic and the celestial equator?
About 23.5 degrees.The celestial equator and the ecliptic are two "great circles" on the sky coordinate system.Think of them as two hoops of the same size, hinged together at two points (well the hinged points do move but very slowly taking about 26 000 years to move around and come back to the same place again). If you hold onesteady and spin the other one inside it, they stay connected at the two hinges, but they canbe set at any angle to each other.Now put them in the sky. Place the steady one right above the equator all the way around, and tiltthe movable one on the hinges so that it makes an angle of 23.5 degrees with the steady one.The steady one, above the earth's equator all the way around, is the celestial equator. The movable one,tilted 23.5 degrees to the equator, is the ecliptic ... the path that the sun appears to travel in the sky,once around in a year. The hinges ... where the ecliptic crosses the equator ... are the points where thesun is located at the time of the two equinoxes. Halfway between the hinges are the points where thetwo circles are farthest apart ... one where the ecliptic is farthest above the equator, the other whereit's farthest below. Those are the points where the sun is located at the time of the two solstices.
How solstices and equinoxes different?
Equinoxes are the two points among the stars where the sun's apparent annual path crosses the celestial equator. Solstices are the two points among the stars where the sun's apparent annual path reaches its extremes, north and south of the celestial equator.
Why is it that when the sun reaches its greatest distance north or south of the equator it occurs a solstice?
The 'solstices' are not events and they're not calendar dates. They are thetwo points on the map of the stars that are the farthest north and south ofthe celestial equator that the sun can ever be. The sun reaches those pointsnear June 21 and December 22 of each year,
What do you call two days per year when the length of a day and night are equal?
I call them the days when Spring and Autumn begin.They are widely but incorrectly called the equinoxes, but the equinoxes arenot events or dates. They are points on the map of the stars. Specificaslly,they are the two points on the celestial equator there the ecliptic (the sun'sapparent annual path through the stars) crosses it.
Where do all the planets orbits occur on the celestial sphere?
On the celestial sphere there is a line that goes all the way round, called the ecliptic. It is the apparent path of the Sun against the background stars, as the Earth revolves in its orbit. The ecliptic is not the same as the equator (the two planes are inclined by 23½ degrees) but it crosses the equator at two points. The ecliptic defines the plane of the Earth's orbit, because actually the Sun stays where it is while the Earth revolves. The other planets' orbits are almost exactly in the same plane as the Earth's, which means that all the planets stay close to the ecliptic all the time. So a planet's position is pretty well defined by its longitude on the ecliptic, measured from a special point called the First Point of Aries, which is where the Sun is at the Spring Equinox. It is a direction defined by the intersection of two planes, the Earth's equator and the ecliptic. Unfortunately this fixed direction, which is used as the basis of the geocentric spherical-coordinate system (right-ascension and declination), is not itself actually fixed, but it moves right round the ecliptic every 25,000 years, so star atlases have to be redrawn and republished every 50-100 years.
