⏰ when
When was the first Einstein ring discovered?
SpaceCosmology
Quick Answer
The first complete Einstein ring was discovered in 1987. It is known as B1938+666.
The Full Story
The first complete Einstein ring was discovered in 1987 and cataloged as B1938+666. Einstein rings occur when a galaxy or other massive object bends light from a more distant source into a near-perfect circle. They are a striking demonstration of gravitational lensing and are useful for measuring the mass of galaxies. The first ring became an iconic example in observational cosmology.
Key Facts
1.Discovered in 1987
2.Object: B1938+666
3.Formed by gravitational lensing
YouTube Angle
Suggested video title for this topic:
"A perfect cosmic ring created by gravity itself."