Stellar motion:, Science

Stellar Motion:

Stars are not fixed  in  the heavens. They are moving within  the galaxies. The speed of a star moving toward or away from the Earth is indicated by a shift of  its spectral lines. If a star is approaching  the Earth, its lines shift towards the blue end of  the spectrum. If  it is moving away from the Earth, its lines shift towards the red end of the spectrum. The greater the star's speed, the more its lines shift. You have read that there are many kinds of stars-blue, yellow or red, normal or giant, pulsating or releasing excessive energy. Most stars nlove together in groups. Only one out of four stars may  travel alone. Of  the rest, almost a third are double stars and the rest are groups of many stars. In a double star system, known as a binary, two stars orbit one another.  In a triple system; there are three stars-all  three may move around each other, or two of  them may move around the third. Then there are loose clusters, with a few dozen stars, to the large globular clusters containing hundreds of  thousands of  stars, all moving in many possible ways.  

Posted Date: 9/28/2012 1:41:46 AM | Location : United States







Related Discussions:- Stellar motion:, Assignment Help, Ask Question on Stellar motion:, Get Answer, Expert's Help, Stellar motion: Discussions

Write discussion on Stellar motion:
Your posts are moderated
Related Questions
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

Ecological Crises:   The natural atmosphere which man has inherited from the past, with healthy and fresh air, shielding from excessive radiation of the sun, has been deteriorat

Explain in brief about the Crop Rotation 1.  Deep rooted legumes may be grown periodically over all fields. 2.  There is more continuous vegetative cover and probably less e

Ask quesExplain that your intention is to investigate a variety of combinations of pipe material, insulation material and size which you could potentially consider when deciding on

what is the speed of light

upright, turn around 180 degrees to face opposite direction Take several steps forward. Reach forward and grasp a door knob Turn a door knob 180 degrees clockwise Sit down in a cha

Definition of a rock and the difference between a rock and a mineral ? A rock is a mixture of one or more minerals. There are many kinds of rocks, and we will learn about them

Explain the Conditions for Ventricular Fibrillation Ventricular fibrillation may be seen in the following two conditions: 1) When a person is electrocuted, and 2)  As a c

where can glacier erosion occur?

Foam extinguishers :  If the burning liquid is in a container the jet should be directed at the inside edge of the vessel or at a vertical surface in order to break the jet and al