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

A weather house, A weather house Changes in the amount of water vapour ...

A weather house Changes in the amount of water vapour are in the atmosphere can be indicated by variation in tension in a few strands of human hair or by using the hygroscopic

Nutrition, 1. A patient with Chronic Kidney Disease (Stage IV), who ma...

1. A patient with Chronic Kidney Disease (Stage IV), who makes very little urine, presents to the hospital with severe nutritional deficiencies.  You are starting her

Food security, discuss determinants of food security

discuss determinants of food security

Explain cells as units of life , 1.  Define the cell theory.  2.  Contra...

1.  Define the cell theory.  2.  Contrast the light microscope with the transmission electron microscope. 3.  Describe the structure and function of the plasma membrane, chro

Explain protective and excretory function, Explain Protective and Excretory...

Explain Protective and Excretory Function Protective function: Large quantity of mucin is secreted by gastric glands. Mucin lubricates the food bolus (a mass of chewed food) an

Beyond the milky way galaxy, Beyond  the milky Way Galaxy: Let us no...

Beyond  the milky Way Galaxy: Let us now move away from the Earth and venture into the space beyond. If we were at a point far out in space we would see scattered in space, a

Define red cells – component of blood, Define Red Cells – Component of Bloo...

Define Red Cells – Component of Blood These are employed in the treatment of all kinds of anaemia which can't be medically corrected, like when rheumatoid arthritis or cancer i

What layer of the earth does magma form, What layer of the earth does magma...

What layer of the earth does magma form? Magma is part of the layer just under the crust. It tell us that while everything seems solid underfoot in fact that is not quite so

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