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(Yahoo)   Scientists say the Milky Way may be half as big as previously thought. They're still charging the same price for it, I bet   (news.yahoo.com) divider line 4
    More: Interesting, Milky Way Galaxy, radial velocities, galactic center, Mike Wall, dark matter, light-years, ESO, half  
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2231 clicks; posted to Geek » on 14 Jan 2013 at 5:50 PM (1 year ago)   |  Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



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2013-01-14 08:00:27 PM  
1 votes:

COMALite J: According to currently en vogue theory, Earth's own Moon is a complete fluke, having been knocked from the Earth itself by a massive collision early on, leaving an enormous crater in the Earth that we now call the Pacific Ocean.


Hm, no. The Earth was liquified by the collision. No crater was left behind.
2013-01-14 07:49:01 PM  
1 votes:

Son of Thunder: "If we infer the properties of the stars that we think are reasonable, then we find the mass of the Milky Way could be half as massive as we currently believe," added Deason

But what if some of the stars are unreasonable?


Demanding top billing, a cut of the gross, flowers in their dressing room, sort of thing?

doglover: GeneralJim: doglover: machoprogrammer: Stars in the far outer reaches of the Milky Way, between 260,000 and 490,000 light-years from the galactic center, are cruising around surprisingly slowly, researchers found. Galactic mass and star velocities are linked, so the results could have big implications.

I thought the galaxy was only 100,000 light years across? How does that work?

Wait, really?

(´・_・`)

I fear for kids today.
Yeah... But, outside of the structure of the galaxy is a group of stars in a "halo," held to the Milky Way by gravity, but NOT part of the structure. Thus:

[www.astrobio.net image 400x399]

I was more worried that he couldn't tell radius and diameter apart.

You seem to have missed that, too.


A 100,000 ly diameter would mean a 50,000 ly radius, which is an order of magnitude smaller than the numbers quoted in the article, so his point stands.

You seem to have missed that.
2013-01-14 06:56:50 PM  
1 votes:

doglover: LDM90: doglover: Astronomy Reporting: Just make shiat up!

There's a 100 million brazillion other planets.

Faster than light travel might be possible with a dyson sphere.

Dark energy is like a chinchilla in a microwave.

Ever hear of physics? Chemistry? Hell, even basic microbiology is more interesting than astronomers' predictions.

Astronomers may have discovered a planet that has water. If it exists, it would have a breatheable oxygen atmosphere. The astronomers speculate the planet's gravity is 1.2 times that of earth.

It's also a waste of time to contimplate unless it's your job, as we can't even get a mars base going, let alone interstellar trips, until the other sciences advance.

Call me when the Pluto mission finally arrives, Curiosity finds Martian life, or Europa gets a probe.


Pluto's getting a very close fly-by in 2015, oddly by the probe that took that awesome pic of the eruption on Europa a few years ago.  New Horizons for the win...
That Curiosity even landed is a testament to all those other sciences.
2013-01-14 05:55:32 PM  
1 votes:

doglover: Astronomy Reporting: Just make shiat up!

There's a 100 million brazillion other planets.

Faster than light travel might be possible with a dyson sphere.

Dark energy is like a chinchilla in a microwave.

Ever hear of physics? Chemistry? Hell, even basic microbiology is more interesting than astronomers' predictions.


I'm going to write a sci-fi book around the massive disappointment that follows when physicists discover FTL travel is only possible within a dyson sphere.
 
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