In science, there are thousands of ways to measure the world around us that the average person may never encounter. For example: Pascals to measure pressure, Candles to measure light intensity, and ...

At the end of the 18th century, the British scientist Henry Cavendish measured the force of gravity between two objects for the first time in a laboratory. The objects in question were lead balls, one ...

If we could see our own galaxy in its entirety, as we see NGC 6744, a twin galaxy 30 million light years away, measuring the Milky Way’s mass would be easy. But we see it from our place in one of its ...

It is tempting to think that some materials are always heavier than other materials. For example, someone might say that metal is heavier than air. But it depends on how much of each material there is ...

How do you measure the mass of a star? Well, according to famed cosmologist Albert Einstein, you can try to solve this problem by looking at the subtle bending of starlight as it encounters the ...

Measuring the mass of stars, planets and moons in the universe usually relies on studying how their motion relates to other bodies nearby. For some objects that are on their own in space, however, ...

NASA’s Hubble Space Telescope has teamed up with the W.M. Keck Observatory to precisely measure the mass of Eris, the largest member of a new class of dwarf planets in our solar system. Eris is 1.27 ...