Explore the awe-inspiring differences in star sizes and their powers, ranging from the smallest red dwarfs to the most massive blue hypergiants. While the Sun is considered a medium-sized star, it’s ...

A typical neutron star is around 20-100 km in size. White dwarf stars: formed when a sun-like star runs out of the last of its helium fuel in its core, and the outer layers get blown off while the ...

So, once a star’s temperature and luminosity are known, its size is easily calculated. Stars emit all colors of the rainbow, to varying degrees.

“Once we had the physical size of the star, we were able to determine the distance from Earth. Our results show it’s a mere 530 light-years from us—25 percent closer than previously thought.” ...

That's because EBLM J0555-57Ab, the smallest star ever discovered, is the size of a planet—specifically, it's just a hair bigger than Saturn. But the star 57Ab is much more massive than Saturn.

By measuring how the star's light dims when planet and moon transit, astronomers learn three key things: the orbital periods of the moon and planet; the size of their orbits relative to the star ...

The Death Star II is a 160-kilometer sphere with an assumed density of 100 kg/m3, similar to modern terrestrial ships. Falling from a low geostationary orbit (2,000 km), the intact Death Star ...