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

State the acid solution weathering, Acid solution weathering Weatherin...

Acid solution weathering Weathering is accelerated by the presence of the hydrogen ions in water.  Rain water dissolves CO 2 from air to form carbonic acid, H 2 CO 3 . When t

Chemistry in golden era, Chemistry in golden era: Chemistry In the fiel...

Chemistry in golden era: Chemistry In the field  of metallurgy  too  we notice some remarkable developmenk. Before the close of the sixteenth century, zinc was isolated by a pr

Define the functions of cerebrospinal fluid, Define the Functions of Cerebr...

Define the Functions of Cerebrospinal Fluid The CSF has many functions. These include the following: 1) It provides the optimum condition for a meaningful signal/stimulus. T

Explain about the soil particle distribution, Soil particle distribution ...

Soil particle distribution The grouping of soil particle distribution into different groups has been done, though arbitrarily, each group represents a range. The limit does no

The effect of rain on sloping soil, The effect of rain on sloping soil ...

The effect of rain on sloping soil Fill a shallow pan or box with firmly packed soil. Set the pan outside in the rain with one end increased slightly. Observe how the raindrops

Longest duration of insolation, Which latitudes and dates would coincide wi...

Which latitudes and dates would coincide with the longest duration of insolation: 50oNorth on June 21

Public health policy, Ascan you promise a perfect job k question #Minimum 1...

Ascan you promise a perfect job k question #Minimum 100 words accepted#

Explain bile salts - constituents of bile, Explain Bile Salts - Constituent...

Explain Bile Salts - Constituents of Bile The liver is the site for synthesis of bile salts. The amino acid glycine is synthesized in the body. Taurine is derived from the sulp

Define the large intestine, Define The Large Intestine The large intest...

Define The Large Intestine The large intestine or colon is about five feet long. It begins at the caecum and terminates at the rectum and anal canal. It is divided into a numbe

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