light years
The Doppler effect
For nearby stars, the parallax method gives the most accurate measure of distances.For nearby stars, the parallax method gives the most accurate measure of distances.For nearby stars, the parallax method gives the most accurate measure of distances.For nearby stars, the parallax method gives the most accurate measure of distances.
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The closer the star, the greater the parallax angle, which is why you can't measure the distance to very distant stars using the parallax method.
the time it takes for something to be accomplished. example: the time it takes for you to run a mile.
A marine chronometer measures time. It is a very precise instrument because it can also be used to measure the longitude of the ship at sea using the time shown and the angle of the sun.
You can measure it by using absolute magnitude.
The sun, the stars.
Astronomers measure it by predicting with the stars and using scientific tools
using a sundial
Using the sun and stars.
It is not known what exact tools Tycho Brahe used to measure the planets and stars movements. He may have made special calculations by using some type of compass.
To measure the distance of stars you have to measure by light years.
Parallax would be easier to measure if the Earth were farther from the sun. This way, there will be a wider angle to the stars using the parallax method.
Look at the position of the stars. See what degree they are at and you'll know the time. That's how ships used to navigate. The position of the stars will allow a knowledgable observer to tell the time. The observable stars depends on location and time of the year.
The simple answer is by using time variant properties.
The sun, stars and the changing between day and night.
You can measure time using a: Sundial Water Clock Sandglass Pendunum Clock Quartz Clock