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If a star has some parallax - if its position against the background stars appears to be a teeny bit different in January than in July - then we know it's pretty close, and we can calculate precisely how far away it is.

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14y ago

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The light from stars are used to determine what?

The light from stars can tell us what type of star it is (our Sun is a G type), the stars spectrum can tell us what elements are in the star, and its intristic brightness can help us determine how far away it is. Also, if there is a wobble in the star, or a change it the stars brightness can tell us if it has a planet.


How can you tell if a planet is in retrograde?

You observe its motion, with respect to the background stars.


How many genearation of stars does the milky way contain?

Some of the white dwarf stars may be only first or second generation; some stars, like the Sun, are certainly at least 3rd. Some of the giant stars may be 4th or 5th; there's no way to tell. Small dim stars are very long-lived; very large, very bright stars may exhaust their fuel in only a few dozen million years. Some stars might easily be in the 8th or 10th generation; we really have no way to know.


What reveals the stars temperature?

The color of a star reveals its temperature. Blue stars are hotter than red stars, with temperatures ranging from about 10,000 K to 40,000 K and higher for the most massive stars.


What are the brightest stars in Southwest Iowa?

That will depend on the time of year. At this time of year, April, the constellations that are visible than at other times of the year. In the early evening you should still be able to see Sirius, the brightest of all stars in the night sky, as seen from earth. Other easily visible constellations at this time of year are Leo and Virgo. The planet Saturn can be seen close to Leo at present. Go to the website at the link below, and enter your location and it will tell you what you can see from where you are.

Related Questions

When look up at the stars at night they seem very close to earth is this accurate?

When you look at the stars at night, you can't really tell how distant they are. They can easily seem to be closer than they really are.


Why stars important to man?

Because stars can predict weathers. Stars can tell time. And stars can tell the right direction.


How can you tell if some one like you?

you can normally tell when some 1 talks to u non stop always close to you


Is it weird if your brother doesnt tell you he loves you?

It is not weird. Some siblings aren't as close as others. My sister doesn't tell me that she loves me, and we are close, she just isn't tell people how she feels very often.


Why do the stars appear to be close together even though they arent?

Because you cannot easily tell how much further away from us one star is than another.


What if you don't like your dad?

tell him and see what he Sadie's our tell some one really close like other member of your family.


What is the uses of stars?

stars tell the time even you dont have a watch


How can you tell when a number is relatively prime?

A number is never relatively prime.Relatively prime refers to a pair of numbers.


How can you tell if sharks are related by looking at them?

not really but some types of sharks you can tell if they stay close that they are mother and baby but other than that i think its hard to tell weather they are related or not.


How can you tell if two numbers are relatively prime?

If their greatest common denominator (gcd) is 1, they're relatively prime.


How do you earn stars in tap zoo?

Near as I can tell you either have to pay real money and buy some or download apps (some free and some cost) and get them that way.


Peter plz tell who's very close to you?

peter plz don't tell who is close to u!