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21 posts tagged with astrophysics. (View popular tags)
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Lost time is never found again. - Franklin

If time (as measured on Earth) were speeding up or slowing down (relative to what it had been in the past) would there be any way for us to notice or measure it? [more inside]
posted by anastasiav on Apr 10, 2014 - 18 answers

Big Space Things Crashing Together

Suppose that 9 Metis were, for some reason, to crash into Jupiter. How big a boom? [more inside]
posted by kafziel on Apr 23, 2013 - 13 answers

Direct line to Stephen Hawking

Where can I find someone willing to help me do relatively simple (ha!) relativistic time dilation calculations? [more inside]
posted by brenton on Nov 2, 2012 - 14 answers

If the earth had a second moon, could the moons ever cross? How and when?

Imagine that the earth is hit by another Mars-ish sized object causing a second moon to be formed. If the second moon were orbiting the Earth inside or outside of the orbit of The Moon, and assuming it was not orbiting the Earth parallel to The Moon, the two moons would have to cross each other at some point, right? A sort of moon-over-moon eclipse thing. How would you calculate how often this would occur? What would it look like? Does this happen on planets with more than one natural satellite? Does the premise of this question make no sense because my knowledge of astrophysics is basically nil? Explain to me like I am in fifth grade, please. [more inside]
posted by Lutoslawski on May 30, 2012 - 7 answers

Twinkle, twinkle, little star. How I wonder what you are.

What makes a star "twinkle"? [more inside]
posted by fignewton on Jan 4, 2012 - 13 answers

Pack the zombies onto a spaceship and headout

When I was younger I spent A LOT of time with face planted in science books with a focus on theoretical physics, space exploration and the structure of the universe. Now I am older, what books or films should I throw myself back into? [more inside]
posted by zombieApoc on Dec 13, 2011 - 10 answers

With whom are we sharing the rest of eternity?

If I've gotten the right impression, much of our currently visible universe will eventually be expanded away from us, never to be seen again. Do we already know how much and what parts of our present neighborhood we'll be left huddling with?
posted by Anything on Dec 4, 2011 - 12 answers

Her brothers want to be garbage men

How do I teach astrophysics to an eight-year-old? [more inside]
posted by Mr. Anthropomorphism on Nov 18, 2011 - 19 answers

How early can you have a mid-life crisis?

I'm working on going back to school for Astronomy/Astrophysics, but I need help figuring out what classes to take at the Community College level here in San Francisco and how best to apply to a school like UC Berkeley. Complicating matters is the fact that I went to school for 4 years for film (don't ask) at Drexel University but didn't graduate. Luckily I spent my first two years at Drexel on a general science track. What I really need help with is figuring out what classes I should take at a school like City College of San Francisco. Also, when is the soonest I can/should apply to UCB? Alternately, what San Francisco adjacent schools have really good astronomy/astrophysics programs? [more inside]
posted by runcibleshaw on May 28, 2011 - 11 answers

Holographic universe physiology

If the 2d universe is holographic, does the surface descriptor end at the "middle" of the universe? [more inside]
posted by torpark on Mar 21, 2011 - 5 answers

Recommended books on astronomy and space exploration

What are some great books on astronomy and space exploration? [more inside]
posted by deansfurniture5 on Mar 16, 2010 - 7 answers

Coincidence? I think not...

Please help me fact-check the following claims about the solar system. [more inside]
posted by spaghettification on Feb 16, 2010 - 37 answers

Branching-out cosmological models

In the realm of astrophysics, are there any charts, graphs, or models (or even physical examples of star clusters, etc) that somewhat resemble the branches of a tree? [more inside]
posted by MattS on Dec 7, 2009 - 7 answers

"It's obviously a wormhole due to these scientific recordings that show...xyz"

Let's say you were an astrophysicist who saw a wormhole open up in the sky above you, and you had video of it, magnetometer readings, whatever else you'd need to record it. What kind of recorded "proof" might be used to identify it as a wormhole-- after the fact? [more inside]
posted by MattS on Nov 16, 2009 - 11 answers

"Stuck in (Red) Shift"

Help me brainstorm clever astrophysics bumper stickers! [more inside]
posted by np312 on Nov 15, 2009 - 15 answers

Is expansion slowing down galaxies?

Does expansion of the universe decelerate orbits of planets and/or rotation of galaxies? [more inside]
posted by knave on Jun 16, 2009 - 11 answers

Big Bang Baffles Bonzai

Why is the Big Bang possible? [more inside]
posted by Bonzai on Feb 20, 2008 - 24 answers

Would our Sun really eat Earth?

Would an expanding Sun really swallow the inner planets? [more inside]
posted by Burhanistan on Feb 5, 2008 - 17 answers

Why isn't the moon headed to the earth?

AstroPhysics: Why doesn't the moon move towards the earth, and other satellite related questions. [more inside]
posted by dpx.mfx on Aug 21, 2006 - 22 answers

Is there an Astrophysicist in the house?

I would like help understanding the CHANDRA xray satellite mission. [more inside]
posted by reflecked on May 4, 2006 - 7 answers

What would happen to the moon?

If there's anyone here who groks physics and math and astronomy and astrophysics here's a great big what-if for you. [more inside]
posted by Grod on Jan 25, 2006 - 14 answers

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