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    Gas around the black hole of galaxy M87

    A spacecraft creates two entangled particles. One of them falls into a black hole, past the event horizon. Inside the black hole, the entangled particle interacts with a piece of matter (and if all else fails the singularity). This forces a measurement on it. Does the wave function...
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    Escaping from a black hole

    Hi! What's wrong with the following method of seeing what life is like inside a black hole and escaping? I can't see anything obvious. We'll assume that time scales and tidal forces aren't an issue (it's obviously impractical -- but is it impossible)? 1. Get a spaceship which can...
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    Earth may get hit tommorow

    I'm curious if it's possible to figure out what type of object it was from the data we received from the collision. All the reports were saying it was coming in at 12.8 km/sec. It released an energy about 1.1 to 2.1 kT of TNT. It was also reported to have been 3 meters across. We've...
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    Unusual object I saw in sky in Boston area

    Hi! I just saw something very unusual in the Boston sky today at 4:00 PM. Yes, in the middle of daylight. It looked a lot like a star and it was almost straight up. It then slowly moved roughly from west to east and went maybe 45 degrees in 5-6 minutes. That would give whatever it is an...
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    Sedna must be a planet (at least for now) according to new definition?

    You also have to consider the following: Sedna's orbit is highly eccentric, so the rule about it clearing out all of the mass in its vicinity doesn't make sense. If an object is in a circular orbit, it's fairly obvious what its neighborhood is. But if it's eccentric, the idea of a neighborhood...
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    Sedna must be a planet (at least for now) according to new definition?

    Hi! I saw the definition of a planet -- basically anything differentiated that has cleared everything in the area and orbits the central star. Pluto doesn't count because it's in the middle of a belt. Ceres doesn't count because it's in the middle of a belt. Sedna -- well...
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