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How do you use Cephids to determine the distances between earth and stars?
Wiki User
∙ 13y ago
These are "variable stars" because their brightness goes up and down with regularity. It was discovered that the frequency depends on the average brightness. So if you see a very dim star behaving as a Cepheid then you can tell how bright it is basically, and then its dimness tells you how far away it must be. Discovering such stars in distant galaxies was a major factor in figuring out the universe is expanding (Hubble).
Wiki User
∙ 13y ago
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What is the average distances between the Sun and Earth and between the Earth and the moon?
about 10,000000km
What is The relationship between distances on the map and the actual distances on earth is?
Map scale
How does the scale bar you determine distances on the earth's surface?
making you fly high in the sky
What part of map helps you measure distance?
The scale bar on a map helps you measure distance. It represents the relationship between the distances on the map to the actual distances on the Earth's surface. By using the scale bar, you can accurately determine the distance between two points on the map.
What shows the relationship between distances on the map corresponding distances on the earth's surface?
A map scale.
What is keeping the distances between the sun earth and the moon?
Gravity
What shows the relationship between distances on the map and the corresponding distance distances on the earth surfaces?
A map scale.
Why did the Au is not used to measure distances on earth?
AU is not used to measure the distances on earth, because a astronomical unit is a unit of measurement equal to the distance between Earth and Sun. So that's why you cannot use Au for measure the distances on Earth.
What is keeping the distances between the sun moon and the earth constant?
Gravity
What units are stellar distances expressed in?
Stellar distances are measured in light-years, which is the average distance between the Earth and the Sun.
What tells the relationship between the distance on the map and the distances on Earth's surface?
scale
What is one scientific field of astronomy?
Astrometry: The study of the movement of the stars relative to the position of the Earth to determine precise measurements and distances from the Earth to those stars.
