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

Radiation and chemical hazards, Let us summarise the important points that ...

Let us summarise the important points that we have understood about the radiation and chemical hazards in this unit. The radiations, causing severe hazards like cancers, mutations,

Explain sterols, Sterols- steroids containing an alcoholic group at C-3...

Sterols- steroids containing an alcoholic group at C-3 position and a side chain of 8  to 10 carbon atoms at c-17

Write a brief note on nccam with its purpose, Question 1 Enlist the seven ...

Question 1 Enlist the seven natural principles of the body according to Unani system Question 2 List and explain the types of treatments (chikitsas) of Ayurveda. Classify the

Aspirations, Aspirations: We often have to make decisions and choices a...

Aspirations: We often have to make decisions and choices about hdw  to spend our time, money and energy. Sometimes  the choices are simple like whether to wear a blue dress or

For chemically reactive wastes, For chemically reactive wastes : The chemi...

For chemically reactive wastes : The chemical property of the waste could be used in its removal in a number of ways as given below: i) Some water-reactive waste could be dispo

Intrusion into the nitrogen cycle, Intrusion into the Nitrogen Cycle: ...

Intrusion into the Nitrogen Cycle: Human intervention can disturb  the nitrogen cycle. Let us see how. When we grow and harvest crops. there is loss of  nitrogen from the soi

Experiment of the rain cycle, The rain cycle You can reproduce the rain...

The rain cycle You can reproduce the rain cycle in miniature in your classroom. Place a box of plant seedlings on the table. Place a metal tray about 35 to 40 cm above the box

Electricity, why do we get shock when we touch an open wire?

why do we get shock when we touch an open wire?

#titlefactors which decide the broad area of scientic acti.., factors which...

factors which decide the broad area of scientic activity

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