What is the term for the apperent shift of stars as viewed from different places in the Earth's orbit?

Answer 1

Parallax

If you choose to go to the following web site for the Wikipedia free encyclopedia; I like the part on "stellar parallax" best.

The following is from that page. But the actual web site is better than this copy of it.

Stellar parallax

Stellar parallax motionOn an interstellar scale, parallax created by the different orbital positions of the Earth causes nearby stars to appear to move relative to the more distant stars. However, this effect is so small it is undetectable without extremely precise measurements.

The annual parallax is defined as the difference in position of a star as seen from the Earth and Sun, i.e. the angle subtended at a star by the mean radius of the Earth's orbit around the Sun. Given two points on opposite ends of the orbit, the parallax is half the maximum parallactic shift evident from the star viewed from the two points. The parsec is the distance for which the annual parallax is 1 arcsecond. A parsec equals 3.26 light years.

The distance of an object (in parsecs) can be computed as the reciprocal of the parallax. For instance, the Hipparcos satellite measured the parallax of the nearest star, Proxima Centauri, as .77233 seconds of arc (±.00242"). Therefore, the distance is 1/0.772=1.29 parsecs or about 4.22 light years (±.01 ly).

The angles involved in these calculations are very small. For example, .772 arcseconds is roughly the angle subtended by an object about 2 centimeters in diameter (roughly the size of a U.S. Quarter) located about 5.3 kilometers away.

Answer 2

Hi. Several of the above answers are correct, but if the points in Earth's orbit are separated by 6 months the the difference in position of Earth is twice the 93,000,000 miles distance. This causes closer stars to shift very slightly in their apparent position. The distance at which the stars shift 1 arc second is called a parsec, short for Parallax Second.

Answer 3

First, desirable temperatures for each individual are impossible, as you will constantly locate somebody who complains. 2nd, you easily *desire* changing climate and seasons (i.e. a tilting of the earths axis), the place temperatures substitute and warmth and water may be transported, with the intention to sidestep some (or, certainly, maximum) areas turning out to be completely ineffective deserts, the two warm or chilly ones. 0.33, this does not artwork with any technologies presently obtainable to humankind. And, ultimately, the consequence of such an endeavour are fullyyt unpredctable with present day climate fashions - we can infrequently even anticipate next week's climate with the present, nicely-favourite orbital parameters.

Answer 4

Parallax

Answer 5

Parallax.