SpeedrooHow fast is a galaxy a billion light-years away moving away from us?
47.8 million mphAbout 77 million km/h · Cosmic
About 47 million mph (21,000 km/s), as the universe expands. Farther galaxies move away even faster.
That's about 1,400,000 times a red kangaroo's top speed of about 35 mph (56 km/h).
🌌47.8 million mph
⚛️an electron in an atom
By speed: a receding galaxy is about 9.8× faster than an electron in an atom.
Things about as fast
- How fast is an electron moving in a hydrogen atom?4.9 million mph
- How fast can a solar eruption travel?6.71 million mph
- How fast does the star S2 move near our galaxy's black hole?17.1 million mph
- How fast is supernova debris?22.4 million mph
- How fast is a lightning strike?224 million mph
- How fast does light travel in a diamond?277 million mph
- How fast does internet data travel in fiber?447 million mph
- How fast does light travel in water?504 million mph
Many real things vary, so we use a typical or official figure. Spotted a mistake? Email [email protected].