What does it mean for the Universe to have a center? Could we ever travel to ours? What is a singularity?
![Jul 2nd: Where is the Center of the Universe?](https://cosmoquest.org/x/365daysofastronomy/files/2016/11/AskASpaceman-03-copy.png)
What does it mean for the Universe to have a center? Could we ever travel to ours? What is a singularity?
How does length contraction work in relativity? Do moving objects really get shorter? What about from their perspective? How are we supposed to make sense of any measurement?]
How can a “big rip” tear the Universe apart? What does that mean for existence itself? Is it going to happen, and what are we doing to find out? I discuss these questions and more in today’s Ask a Spaceman!
In today’s episode, we’re going to look at everything from how past Earth couldn’t support photosynthesis because the days were just too short, to current Earth letting us get hit by more Cosmic Rays prior to Earthquakes going off, and to supernovae threatening our world while alien stars eat other planets.
Today #365DaysOfAstro explains how many stars there are. How many can you see with your eyes, with binoculars or a small telescope? How many stars in the Milky Way? How many in the entire Universe?
The biggest question of them all…why the Universe exists? Find the answers along with other questions on today’s @AwesomeAstroPod at #365DaysOfAstro
It seems like the good times will go on forever, so feel free to keep on wasting energy. But entropy is patient, and eventually, it’ll make sure there’s no usable energy left in the Universe.
Today’s @AwesomeAstroPod talks about latest JWST findings that may have broken cosmology and changed everything we thought we knew about the history of the universe. Also March Sky Guide!
How do we know that the universe doesn’t rotate? Why would it matter if it did? What does all this have to do with time travel?