1.Is time travel possible?
2.What is Dark Matter? ...
3.What is Dark Energy? ...
4.What Came Before the Big Bang? ...
5.What's Inside a Black Hole? ...
6.Are We Alone?
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Answers
Answer:
1.General relativity. Time travel to the past is theoretically possible in certain general relativity spacetime geometries that permit traveling faster than the speed of light, such as cosmic strings, transversable wormholes, and Alcubierre drives.
2.Dark matter is a form of matter thought to account for approximately 85% of the matter in the universe and about a quarter of its total mass–energy density or about 2.241×10−27 kg/m3. ... Most dark matter is thought to be non-baryonic in nature; it may be composed of some as-yet undiscovered subatomic particles.
3.In physical cosmology and astronomy, dark energy is an unknown form of energy that affects the universe on the largest scales.
4.No one knows exactly what was happening in the universe until 1 second after the Big Bang, when the universe cooled off enough for protons and neutrons to collide and stick together. Many scientists do think that the universe went through a process of exponential expansion called inflation during that first second
5.The event horizon is where the escape speed exceeds the speed of light: you'd have to be going faster than light (which is impossible for any bit of matter) to escape the black hole's gravity. Inside the event horizon is where physics goes crazy. ... A singularity is what all the matter in a black hole gets crushed into
6.nope!!!because we have family ,friends and many more things
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