Einstein’s theory of general relativity

General relativity is physicist Albert Einstein‘s understanding of how gravity affects the fabric of space-time. The theory, which Einstein published in 1915, expanded the theory of special relativity that he had published 10 years earlier. Special relativity argued that space and time are inextricably connected, but that theory didn’t acknowledge the existence of gravity. Einstein spent the decade between the two publications determining that particularly massive objects warp the fabric of space-time, a distortion that manifests as gravity, according to NASA. How does general relativity work? To understand general relativity,…

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This week on the Space.com forums: Ancient climate, plastic rocket fuel and alien life!

Welcome back to your weekly review of the Space.com forums. Our growing community loves nothing more than chatting about science and exploration of the great beyond. Join the community today and sign up to be part of the conversations!  Oh, and if you hurry, you might be in time to enter a very special giveaway. This week, the community buzzes about a Space.com story concerning Earth’s ancient climate. Then, we see one community member ask a pair of intriguing questions.  Ancient Earth The history of CO2 on Earth is preserved…

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SpaceX launches new solar arrays to space station, nails rocket landing at sea

CAPE CANAVERAL, Fla. — SpaceX launched its 17th rocket of the year today (June 3), sending a robotic Dragon cargo capsule toward the International Space Station before nailing a landing at sea.  A two-stage Falcon 9 rocket blasted off from Pad 39A here at NASA’s Kennedy Space Center at 1:29 p.m. EDT (1729 GMT), kicking off the company’s 22nd resupply mission to the orbiting lab for NASA. The Dragon is packed with more than 7,300 lbs. (3,311 kilograms) of supplies, scientific experiments and hardware, including two new solar arrays for…

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