Space-Time All the Universe’s a Stage In the 1900s, Albert Einstein unified the concepts of space and time, giving us a useful new way to picture the Universe. At the start of the 20th century, physicists had a problem: The speed of light was always the speed of light. If you threw a baseball out...
Can We See Farther Back In Space Than We Can In Time? The Universe is estimated to be 13.8 Billion Years Old, but we can see back 46.1 Billion Light-Years. Here’s how the expanding universe does it. No matter where you look in the universe, in any direction, your line of sight will eventually run...
Can We See Farther Back In Space Than We Can In Time? The Universe is estimated to be 13.8 Billion Years Old, but we can see back 46.1 Billion Light-Years. Here’s how the expanding universe does it. No matter where you look in the universe, in any direction, your line of sight will eventually run...
Space-Time All the Universe’s a Stage In the 1900s, Albert Einstein unified the concepts of space and time, giving us a useful new way to picture the Universe. At the start of the 20th century, physicists had a problem: The speed of light was always the speed of light. If you threw a baseball out...