The visible universe—including Earth, the sun, other stars, and galaxies—is made of protons, neutrons, and electrons bundled together into atoms. Perhaps one of the most surprising discoveries ...

While telescopes reveal countless galaxies, each containing billions of stars, physicists and astronomers believe that ...

International Journal of Theoretical Physics, Vol. 63, Issue. 8, This is a concise introduction to modern astrophysics for physicists, with a focus on galaxy dynamics and the discovery of dark matter ...

The elusive stuff is thought to make up about 85% of all matter in the universe, and scientists can measure the way its gravity affects visible matter, like planets, stars, and galaxies.

given the amount of visible matter there was there. But the concept really started gaining traction with the work of the US astronomer Vera Rubin from the 1970s onwards, who showed a consistent ...

The visible universe — all the potatoes, gas giants, steamy romance novels, black holes, questionable tattoos, and overwritten sentences — accounts for only 5 percent of the cosmos. A Virginia ...