“You can witness the evolution and destruction of humanity; the end of the Earth and Sun; the dissociation of our galaxy; the heat death of the Universe itself. So long as you have enough power in your space ship, you can travel as far into the future as you like.”
Have you ever wondered about time travel? Perhaps you have your destination in the far future, and want to see how it all turns out? Maybe you want to return to the past, and alter the future or present by your actions there? Or maybe you want to freeze time altogether? If you want to know whether it’s possible, the physics of relativity holds the answer. Special relativity allows us to control our motion through time by manipulating our motion through space. The more we move through space, the less we move through time, allowing us to travel as far as we want into the future, limited only by our energy available for space travel. But going to the past requires some specific solutions to general relativity, which may (or may not) describe our physical Universe.
What’s the status of traveling through time? Come get the scientific story (with a brand new podcast) today!
Happy International Women’s Day! Sally Ride, the first American woman in to fly in space, taught us all that the sky is not the limit!
As if approaching in an intergalactic spaceship, I love the sense of grandeur captured in this zoomed-in view of NGC 5033. Lying some 40 million light-years away, it features an active and bright galactic nucleus that is thought to contain a supermassive black hole. (Image Credit: NASA, ESA; Processing: Judy Schmidt)
Insight Astronomy Photographer Of The Year 2016 Winners
AR 12192 was an unusually large active region (AR) on the Sun; spanning a distance of 1.2 million kilometers or 30 lengths of Earth’s circumference. Active regions are areas of particularly strong magnetic fields that can contain one or more sunspots. Depending on the complexity of the magnetic field, spots can have various field configurations. AR 12192 had a complicated δ -type sunspot group in which several umbrae shared a common penumbra.
This image sequence was created with frames captured by the Solar Optical Telescope (SOT) on 2014 October 24.
Image credit: NASA/Hinode/SOT
Starfire book cover by sparth
The Crab Nebula
Credit: NASA
Inside - Vadim Sadovski
Carina Nebula: “Mystic Mountain”
via reddit
Bruce Pennington
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