Stellar parallax, Science

Assignment Help:

Stellar Parallax

If  the Earth were stationary, a given line  joining  point A on the Earth, a nearby star C and any given distant star would never vary. However, if  the Earth changed its position in space and moved  from A to B, this alignment would also change. Thus, in the background  of more distant stars, the hearby star would apwar to shift from C1  to C2  as the Earth moved  from A to B. This apparent shifting of nearby stars against the background of more distant ones has been observed, and the phenomenanis  called Stellar parallax. It is a periodic kind of a chahge. A given star first shifts one way and then the other, during the course of  one year, hence it must be due to the fact that the Earth is moving around the Sun.  

The change is small, less than a second of  an arc. It was only  in  1838  that Friedrich Bessel, a German astronomer, could measure the stellar parallax of  a  star. -1  he  nearest star, the Sun when viewed against distant stars appears to shift approximately  1" per day.  


Related Discussions:- Stellar parallax

Paper manufacturing in golden era, Paper manufacture: Paper was not use...

Paper manufacture: Paper was not used in India until the eleventh century. This Chinese invention of the first .century A.D. reached India mainly through the Ghorian conquerors

Heterotrophic nutrition, how many types of heterotrophic nutrition in plant...

how many types of heterotrophic nutrition in plants?..

Carbohydrates, define carbohydrates.give a brief account on classification ...

define carbohydrates.give a brief account on classification of carbohydrates.

Earth''s surface is most direct at which latitude, The angle of insolation ...

The angle of insolation on the Earth's surface is most direct at which latitude: At  0 o latitude

Food as fuel for the body machine, Food as fuel for the body machine: B...

Food as fuel for the body machine: Body requires food for internal as well as external activities and for growth. Another way of  looking at this is that the body requires ener

Where to find fossils, Where to find fossils In some localities fossils...

Where to find fossils In some localities fossils may be found in stone quarries or where there are rock out- crops. Try to search someone in the community who knows about fossi

Explain the methods of food processing, The methods of food processing by c...

The methods of food processing by covering the two major methods- thermal processing dehydration.  Food processing methods which include  freezing, microwave proces

Causes of fire and fire hazards, Causes of Fire :  The potential fire risk...

Causes of Fire :  The potential fire risk arises from the presence of combustible solids, liquids or gases in conjunction with ignition sources. One or more class is generally fou

Magma that reached the earths surface, Magma that reached the Earths surfac...

Magma that reached the Earths surface is known as: Lava

Ecology and environment, Ecology and environment: Today, we hear people...

Ecology and environment: Today, we hear people from different walks of  life, using the terms ecology and environment. Politicians,  leaders. town planners, students and archit

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd