When Pagan and DePasquale first receive the images, they appear in black and white. The colors are added to the image later, ...

Astronomers compile a large sample of an unusual class of objects in an effort to connect the dots to the early universe.

In 1925, grad student Cecilia Payne first proposed that stars were mostly made of hydrogen and helium and shaped our ...

Then, a period of reionization, cleared away this foggy existence an introduced light into the universe. Now, an ...

A Yale-led team of astronomers has detected an intensely brightening and dimming quasar that may help explain how some ...

The universe tells us its story mainly through light and other wavelengths of electromagnetic radiation. We learn about the planets, stars, and galaxies by their light—visible light, and also ...

In other words, the universe must be expanding. He announced his finding in 1929. The ratio of distance to redshift was 170 kilometers/second per light year of distance, now called Hubble's constant.