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What is a sentence with luminosity?
The stars shone with a luminosity reminiscent of diamonds on black velvet .
What is the luminosity of Deneb?
Deneb has a luminosity (apparent magnitude) of 1.25. However, in bolometric luminosity (solar units) Deneb is 54,000, whereas our Sun is 1.
Are The most common type of stars are low luminosity stars?
Yes. Around 76% of the stars are low luminosity stars.
If a star is blue is its luminosity high or low?
Blue stars are very hot stars and so usually have high luminosity.
What process of losing their outer layer causes stars to lose?
luminosity or brightness
What is a sentence with luminosity?
The stars shone with a luminosity reminiscent of diamonds on black velvet .
What is the luminosity of Deneb?
Deneb has a luminosity (apparent magnitude) of 1.25. However, in bolometric luminosity (solar units) Deneb is 54,000, whereas our Sun is 1.
Are The most common type of stars are low luminosity stars?
Yes. Around 76% of the stars are low luminosity stars.
How do you measure the distance to a star?
Several methods exist. A fairly obvious one is the parallax method - while Earth moves around the Sun, it changes its position by about 300 million km.; this will change the apparent position of nearby stars. For star clusters or galaxies that are further away, several "standard candle" methods exist, which basically consist of comparing the real luminosity of objects that have a known brightness (like certain types of stars) with their apparent luminosity.
How did scientists gather information about stars?
Scientista started to gather information by observing the stars and learnt from here. First they used parallax to get the distance, then the apparent brightness, but after a while they can get luminosity, size/mass, what fuel they use (eg.helium), and then from that the learnt about the starts lifetime. Hope this is helpful
If a star is blue is its luminosity high or low?
Blue stars are very hot stars and so usually have high luminosity.
What can parallax be used to determine about a star?
Parallax is a method used to find the distances of stars.
What process of losing their outer layer causes stars to lose?
luminosity or brightness
What is the apperent movement of stars called?
parallax
Which stars have the largest parallax angles-?
the stars nearest Earth
Do all-stars have measurable parallax angles?
No, only the closer ones have a parallax that is large enough to be measured. The first star to have its parallax measured was 61 Cygni, measured by Bessel in 1838 and found to be at a distance of 10.3 light years, later corrected to 11.4. The closest star Proxima Centauri has a parallax of only about 0.7 seconds of arc. Before then the absence of parallax for the stars was considered an important part of the case that the Earth cannot be revolving round the Sun.
What object looks as if the position has shifted when it is viewed from different locations this is referred to as?
It is called parallax and is often used for calculating the distance to stars and other distant objects which can't be measured directly.
