Real-time sunset from orbit. They only last about 8 seconds from start to finish, but seeing 16 per day makes up for it! Timelapses through the transition can be challenging as the exposure overwhelms the camera's dynamic range.
A Black Hole Can Be Dragged Through Spacetime
A Black Hole does not have to sit still.
Einstein’s equations allow a stranger possibility... a Black Hole that accelerates.
This is the C-metric, an exact solution of General Relativity describing an accelerating Black Hole.
The Black Hole accelerates because the geometry of Spacetime says it must.
The C-metric is one of those exact solutions that reminds us how wild General Relativity really is. Gravity is not just attraction, and Spacetime is not just a stage.
Sometimes the stage itself contains the force.
#Astrophysics #GeneralRelativity #Einstein #CMetric #BlackHole #CosmicStrings #Spacetime #Cosmology #Mathematics #Physics
Light from GN-z11, one of the farthest known galaxies, has traveled 13.4 billion years to reach us. During that time, the expanding universe has carried this bright, infant galaxy another 20 billion light-years (or so) away. #MondayMotivation