If nothing gets out of a black hole, how does gravity do it? Something with virtual gravitons? Is this really necessary? It's tricky question, but this is what I can say without resorting to equations.
What does it mean that gravity is not a force? In this video I will revisit the question and explain why you are currently accelerating upwards, and how Einstein's equivalence principle works.
This new finding from the NANOGrav team is like adding another color – gravitational waves – to the picture of the early universe that is just starting to emerge, in large part thanks to the James Webb Space Telescope.
Physicists believe most of the matter in the universe is made up of an invisible substance that we only know about by its indirect effects on the stars and galaxies we can see. But the nature of dark matter is a longstanding puzzle.
Research led by the Atacama Cosmology Telescope collaboration maps the universe’s cosmic growth supporting Einstein's theory of general relativity.
How the Greenhouse Effect Really Works.
A few years ago, the first dark matter-free galaxies were announced, and then immediately disputed. Now, there are too many to ignore.
The results may offer insight into the inconsistency between quantum mechanics and the theory of general relativity, which describes gravity and the behaviour of the universe at very large scales.
Any distant gravitational source can emit gravitational waves and send out a signal that deforms the fabric of space, which manifests as gravitational attraction. But while gravitational forces fall off as the distance squared, the gravitational wave
For the first time in history, gravitational wave astronomy isn't a pipe dream, nor is it a way of looking for esoteric objects we can't see via any other means.
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