Gravitational Lensing
What is Einstein’s Theory of Relativity?
More than a century after he first proposed it, Einstein's Theory of Relativity is still foundational to our understanding of…
If Alien Probes are Already in the Solar System, Maybe we Could Detect Them Calling Home
According to a new study, alien probes may permeate the galaxy, and could be detected in the Solar System when…
Advanced Civilizations Could use Their Stars to Communicate (and as Telescopes)
A Long Distance Call E.T. managed to call home with a Speak and Spell, buzzsaw blade, and an umbrella. The…
What a Perfect Gravitational Lens
A stunning new photograph from the Hubble Space Telescope shows a nearly perfect Einstein Ring, an effect caused by gravitational…
Astronomers saw the Same Supernova Three Times Thanks to Gravitational Lensing. And in Twenty Years They Think They’ll see it one More Time
It is hard for humans to wrap their heads around the fact that there are galaxies so far away that…
It Could be Possible to see Gravitational Wave Lenses
Can waves of gravity be lensed by gravity? A recent study looks for lensed gravitational waves.
Gaia Might Even be Able to Detect the Gravitational Wave Background of the Universe
Data from the Gaia satellite is so precise, it might be able to detect cosmic gravitational waves.
A new Technique Could use Quasars to Directly Measure the Expansion Rate of the Universe
The evolution of cosmic expansion could be measured by a new method using intensity correlation speckles.
You Thought Black Hole Event Horizons Looked Strange. Check out Binary Black Hole Event Horizons
Binary black holes lens light so strongly it's difficult to simulate how they would appear. A new simulation shows us…
Gaia Finds 12 Examples of Einstein Crosses; Galaxies Being Gravitationally Lensed so we see Them Repeated 4 Times
After examining data from the Gaia Observatory, a team of researchers found 12 more examples of the rare phenomenon known…