Astronomers measure the amount of light a star gives off in different colours.

Theoretical calculations suggest it should be 1060 times larger than what astronomers have measured.

Astronomers measure this using something known as the Schwarzschild radius.

Astronomers also measure the apparent size of objects as an angular diameter.

Astronomers measure distance by calculating how far toward the red end of the spectrum light from an object has shifted.

Despite these advances, astronomers, limited by the Earth's atmosphere, could only measure the distances to the nearest galaxies.

Astronomers can measure the temperature of the cosmic background radiation, and they do indeed get 3 Kelvin.

Astronomers can now measure differences as small as one-hundredth of a magnitude.

Since ancient times, astronomers have measured the distance of nearby planets and stars by using trigonometry.

When astronomers measure the composition of the sun, it matches Orgueil.