For centuries, humanity believed that Earth was the center of the universe, a view championed by Aristotle and Ptolemy. But ...

For reference, Pluto’s average distance from the Sun is about 40 AU, so 2023 KQ14 is quite distant. At 23.4 billion miles (37 ...

Alone among known planets, Earth has vast oceans on its surface and its landmasses are marked with lakes and extensive river ...

We've only known about its existence for a few short weeks, and already astronomers have been able to learn a lot about the mysterious interstellar comet 3I/ATLAS. The object was detected on 1 July ...

When white dwarfs—the hot remnants of stars like our sun—are orbited closely by another star, they sometimes steal mass away ...

Now the diameter of the known universe can be described as 558 billion trillion miles (that’s 558 followed by 21 zeros) or 28 ...

Some of that seems to be related to a general lack of familiarity with what an astronomical unit actually is (it's the distance from Earth to the sun, for the record), but there's also the fact ...

If you guessed the astronomical unit, you are correct. The au — the rough distance between the Earth and the Sun — was previously determined by a confusing calculation (“the radius of an ...

Westmont will open its observatory and powerful Keck Telescope for this month’s free public stargazing event, beginning at 8:30 p.m. and lasting several ...

Earth's orbital distance from the sun is called an astronomical unit. 2017 OF201 is currently located at a distance of 90.5 astronomical units from the sun, meaning 90.5 times as far as Earth.

Kurth says it was determined that this interface existed at about 120 astronomical units — an astronomical unit representing the distance between the Sun and Earth, about 93 million miles.

At that time, the comet was already magnitude 10.4 and closing in on the Sun at a distance of just 1 astronomical unit, or AU (1 AU is the average Earth-Sun distance).