Time Travel
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Most Recent Questions
- followup to https://blogs.cornell.edu/curious/intermediate/can-we-look-back-into-time-and-see-the-beginning-of-the-universe/. If the universe is expanding, how do we know that we could look back to its beginning; i.e., how do we know there is not more universe beyond what we can “see”?
- How hot was the Sun 1 billion years ago?
- Years ago I read “The Five Ages of the Universe” in which it postulates that 2nd Law of Thermo. (wherein all systems move from a higher energy state to a lower one). Hurricanes are equator to pole heat transfer engines. Are Galaxies the same on a enormously larger scale? They sure look similar!
- what planets have hurricanes (not tornadoes or dust storms)
- If the universe keeps expanding, is there an end? (Like the universe stop expanding, etc)
- are there vibrations in intergalactic space that can be detected by astronomical devices?