0
What compares the brightness of stars as if they were the same distance from earth?
Wiki User
∙ 9y ago
midorz
Wiki User
∙ 9y ago
Add your answer:
Earn +20 pts
Is it true that two stars that have the same brightness are the same distance from earth?
false
The diffence in brightness between two stars is related to the?
Their distance away from you and their intrinsic luminosity.
How is the number of light years figured between two celestial objects?
To find the number of light years between two celestial objects, we first find the distance from each object to earth. If we connect the dots between Earth and the two objects, we have a triangle. We to sides lengths of that triangle (the distances between Earth and the objects), and we can measure one angle (the angle at the vertex where Earth is. This is enough information to find the distance between the objects using trigonometry (in this case, the law of cosines). Finding the distance from Earth to an object can be a bit complex. One commonly used method is to look for a pulsating star. We can figure out the absolute brightness (how bright it is without factoring in distance away) of these stars by how often they pulse. Then we can measure the apparent brightness (how bright it looks to us). We can then use both these values to find the distance to the star. (This also works for some supernovae.) Another method is to use objects that are considered to be 'standard candles'. These objects do not pulse, but we know the relationship between their absolute brightness, apparent brightness, and distance away.
What two things do astronomers compare to calculate the distance to a star?
They use trigonometry to measure the parallax error in the nearby star's position based on a large triangle, the base of which is formed by two times the distance of the Earth to the Sun. Simply stated, they plot the star's position on one day, and again six months later, when the Earth is 186,000 miles away from its original position. They use the far distant stars as a calibration standard, and use the Pythagorean theorem to figure out the rest.
Why is absolute magnitude stars used in the HR diagram?
The equation for the magnitude of a star is; M=m-5log(d/10) where:M - Absolute magnitude (The brightness of a star viewed 10 parsecs away)m - Apparent magnitude (The brightness of a star as viewed from Earth)d - Distance from the star (Pc)
What is a stars brightness as if it were a standard distance?
Theres `Absolute Magnitude` which is the brightness of a star at a set distance. Then there is `Apparent Magnitude` which is the apparent brightness from earth, regardless of distance.
Is it true that two stars that have the same brightness are the same distance from earth?
false
What factors determine a stars brightness as seen from earth?
Distance from Earth, size of star, and temperature of star.
What factors determine a stars brightness seen from earth?
Distance from Earth, size of star, and temperature of star.
What are the three main elements that determine a stars brightness from earth?
1) absolute brightness 2) distance 3) intervening dust
What three things determine which stars you see in the sky?
Your place on the earth, The brightness of the star, Its distance.
If two stars have the same apparent magnitude are they the same distance from Earth?
No. Brighter distant stars can have the same apparent magnitude as fainter stars that are closer.(Absolute magnitude does not refer to actual brightness, but rather to what the brightness of a star would likely be at an arbitrary distance of 10 parsecs, rather than its actual distance.)
What affects the brightness of stars?
relative "brightness" is based on distance, size, and temperature
What is a stars apparent magnitude?
a stars brightness as seen from Earth
How can varble stars be used to determine the distance to globular clusters?
The idea is that CERTAIN TYPES of stars, including certain variable stars (such as Cepheids) have a known brightness; so if you observe their apparent brightness, you can calculate their distance.
How can you clasiffy the stars?
by temperature, size, brightness, distance and color
What two factor affect a stars apparent brightness?
Two factors that affect a star's apparent brightness are: 1.) The distance between the Earth and the star 2.) The absolute magnitude (the actual brightness) of the star Hope that helps :P
