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

Define the sensory speech area of the cerebrum, Define the sensory speech a...

Define the sensory speech area of the Cerebrum The sensory speech area is situated in the lower part of the parietal lobe and extends into temporal lobe as indicated in the Fig

Sleeper Sharks, I need to fine the role and the importance of the Sleeper S...

I need to fine the role and the importance of the Sleeper Shark to an ecosystem.

What is extinction?, What is extinction? When did it happen? What are some...

What is extinction? When did it happen? What are some human activities that lead into extinction

Explain vaginal bacteria - external defence mechanism, Explain Vaginal Bact...

Explain Vaginal Bacteria - External Defence Mechanism Vaginal bacteria: Certain bacteria normally live in the vagina. They produce lactic acid, which kills the bacteria. Hence,

How can percentage of solid particle been calculated, How can percentage of...

How can percentage of solid particle been calculated The percentage of solid particles and pore space in a soil may be calculated from the bulk density and particle density if

What is the structure of the urinary bladder, What is the structure of the ...

What is the structure of the urinary bladder? The bladder is composed of four layers of tissues. The outermost serous membrane is a thin membrane lining the closed cavities of

Explain amino acids, Amino acids are the building blocks of proteins. All ...

Amino acids are the building blocks of proteins. All proteins consist of a sequence of amino acids,  which  are compounds containing  an  amino group  (-BIB)  and  a carhoxyl  gro

Explain physical barrier for external defence mechanism-skin, Explain physi...

Explain physical barrier for External Defence Mechanism - Skin It provides nice protective covering to the body.  The outer layer- horny layer - contains dead keratinized cells

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