For the first time, scientists measured a newborn black hole that "kicked" off into space after 2 larger black holes merged ...

The team concluded that the recoil of the remnant of GW190412 surpassed 50 km/s – enough to expel the black hole from a ...

Two black holes merged together 2.4 billion light years away from Earth, and scientists have just figured out how fast the ...

Almost all measurements of motion in astronomy make use of a law of physics called the Doppler effect. This change in the wavelength (or frequency, color, or pitch) of a wave emitted by a moving ...

This is really a lab that I have students do, but I am pretty sure they don't read this blog - so it is ok. If they are reading this, hi! We have these projectile cannons that shoot small balls. In ...

The motion of any object is relative. On Earth we tend to ignore that, because the vast background of the ground gives us a seemingly fixed and absolute frame of reference. Sitting comfortably at our ...