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

Explain proximal convoluted tubule - structures of a nephron, Explain the P...

Explain the Proximal Convoluted Tubule - Structures of a Nephron Proximal Convoluted Tubule or proximal tubule (PCT): The proximal tubule is the most proximal part of the renal

Explain oxygen dissociation curve, Explain Oxygen Dissociation Curve Wh...

Explain Oxygen Dissociation Curve While different partial pressures of oxygen are  plotted against the amount of  oxyhaemoglobin created or  dissociated, the sigmoid  curve  is

Explain colouration of faeces - functions of bile, Explain Colouration of f...

Explain Colouration of faeces - Functions of Bile The iron-free breakdown products of haemoglobin (i.e. bilirubin and biliverdin) oxidize to brown stereobilin. This stereobilin

Determine the properties of soil taxanomy, DEtermine the properties of soil...

DEtermine the properties of soil taxanomy The system of Soil Taxonomy is based on soil properties which in turn depend on soil genesis i.e., the way soil is formed. A number of

Define benefits and constraints of multicellular organisms, Define Benefits...

Define Benefits and Constraints of Multicellular Organisms Some of the benefits and constraints of multicellular organisms are as follows: 1) There is a unique co-ordination

Contour lnes.., five charactrstic of the contour lines

five charactrstic of the contour lines

Science omework, what is the weigt on earth of an object that has a mass of...

what is the weigt on earth of an object that has a mass of 22 kg?

Explain lipid metabolism i, Explain Lipid Metabolism I ? You learnt ear...

Explain Lipid Metabolism I ? You learnt earlier in Unit 5 that the lipids are absorbed through the intestine. As these molecules are oils, solubilization (emulsification) of di

Origin of agriculture and civilisation, The Origin of Agriculture and Civil...

The Origin of Agriculture and Civilisation : There is no historical evidence to tell us exactly how agriculture arose.  We can only imagine what may have happened. Cultivatio

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