Astronomy Facts | Facts about Astronomies

Who discovered the four largest moons of Jupiter?

Italian scientist Galileo Galilei discovered Jupiter's four largest moons in 1610 using a telescope he improved himself.

The 40-inch refracting telescope at Yerkes Observatory in Wisconsin, completed in 1897, is the largest refracting telescope ever used for astronomy.

Pluto was discovered in 1930 at Lowell Observatory in Flagstaff, Arizona, which in 2001 became the world's first International Dark Sky City.

Hydrogen is the most abundant element in the universe, making up about 75% of all normal matter by mass.

Much of the universe's gold is thought to be created when neutron stars collide, which scientists observed for the first time in 2017.

Massive stars collapse once they start fusing iron.

Most of Uranus's moons, including Miranda, Oberon, and Titania, are named after characters from Shakespeare's plays.

Galileo observed that Venus has phases like the Moon, evidence that it orbits the Sun.

The International Space Station can be seen from Earth with the naked eye.

A transit of Mercury happens when Mercury passes in front of the Sun as seen from Earth.

Venus is called the "morning star" and "evening star" because it's so bright near sunrise and sunset.

Uranus was the first planet discovered with a telescope, by William Herschel in 1781.

The first image of a black hole, in the galaxy M87, was released in 2019.

Cygnus X-1 was the first object widely accepted as a black hole.

The Painted Hills are a great place for stargazing.