The Astronomy Thread

[abhidev]

are they real ???

 

[doomgiver]

Scientists discover that a Black Hole's edge spins at nearly the speed of light.

l

that thing must be putting out radiation shorter than gamma rays!!!
or wait, are we talking about the event horizon or the edge of the accretion disk?

desmond, i think we are long lost brothers, you like the same things i do (wh40k, metal, space)

 

[Desmond]

Dude, where you been hiding for so long. Only if I had real friends like you. <sniff>

Yes, I was talking about the accretion disc. See the link.

 

[icebags]

Hubble Discovers a Fifth Moon Orbiting Pluto

How come hubble telescope can discover another moon orbiting pluto, but not another moon orbiting earth ? i thought hubble telescope is near to earth than pluto ..... >.<
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jk.

 

[Desmond]

What second moon orbiting earth?

 

[doomgiver]

er, im about as confused right now as you are.

dude, you shouldnt drink and post.

 

[Desmond]

What's the possibility of another moon orbiting the earth?

Like, is it beyond the dark side of the moon and takes the same time to revolve around the earth as the moon that's why no one saw it?

 

[icebags]

What's the possibility of another moon orbiting the earth?

Like, is it beyond the dark side of the moon and takes the same time to revolve around the earth as the moon that's why no one saw it?

further away you go beyond the moon, considering the revolution time is same, lower the mass cap we get. If a huge mass would have been there beyond moon, earths behavior to [moon & that hidden moon] would have been coupler like - i.e. center of rotation would have been a bit towards the edge of earth surface, or somewhere between earth and moon.

so, as earth and moon are not jumping around, its safe to imagine there is no big moon beyond our only moon *l.yimg.com/us.yimg.com/i/mesg/emoticons7/39.gif , and since we no see any other moon in sky, there is no other earth moon in the sky and thus hubble can't discover it.

anyways, we can image a few asteroid stuff orbiting earth here or there, but they can't be moon, since we cant see them in naked eye and neither there is any point for hubble to discover them.

puzzle solved. case closed. *l.yimg.com/us.yimg.com/i/mesg/emoticons7/26.gif

 

[gagan_kumar]

What's the possibility of another moon orbiting the earth?

Like, is it beyond the dark side of the moon and takes the same time to revolve around the earth as the moon that's why no one saw it?

no other moon but there is possibility of dark matter presence I think...

 

[doomgiver]

dark matter has mass. we have insanely accurate acceleometers.
what icebags said in his reply above still applies.

tl;dr : if there was a moon, natural, or not, visible or not, we'd have detected it by now.

 

[Desmond]

Of course, that's why I was wondering why that guy was saying that hubble could not discover another moon orbiting the earth.

Edit :

I have posted this in another thread earlier, but here goes nothing :

Asteroid-Mining Project Aims for Deep-Space Colonies

*i.space.com/images/i/000/025/341/original/deep-space-industries-wheel-construction.jpg?1358879524

A new asteroid-mining company launched Tuesday with the goal of helping humanity expand across the solar system by tapping the vast riches of space rocks.

The new firm, called Deep Space Industries, Inc., announced today (Jan. 22) that it plans to launch a fleet of prospecting spacecraft in 2015, then begin harvesting metals and water from near-Earth asteroids within a decade or so. Such work could make it possible to build and refuel spacecraft far above our planet's surface, thus helping our species get a foothold in the final frontier.

*www.space.com/19368-asteroid-mining-deep-space-industries.html

I can't believe that this is happening during my lifetime.

More pics :


*i.space.com/images/i/000/025/337/i02/deep-space-industries-archimedes-concept-2.jpg

*i.space.com/images/i/000/025/338/i02/deep-space-industries-archimedes-concept-3.jpg

 

[gagan_kumar]

real surprise dude real surprise........................if it is true..........

btw dark matter mass can't be accurately measured.........

it can't be detected.....

 

[quagmire]

[size=+2]Astrobiologists Find Ancient Fossils in Fireball Fragments[/size]

Images-

Spoiler

*www.technologyreview.com/sites/default/files/images/Polonnaruwa%20meteorite.png

"The results of these tests, which the Cardiff team reveal today, are extraordinary. They say the stones contain fossilised biological structures fused into the rock matrix and that their tests clearly rule out the possibility of terrestrial contamination."

- Source

Offtopic (Sort of on topic)- Has anybody here read Dan Brown's Deception Point ?

 

[icebags]

I can't believe that this is happening during my lifetime.

not sure about asteroid mining by private companies, or how profitable it would be, but nasa expressed it interest in probing some asteriod soon. they are gonna collect some samples and bring those back from sky in coming years. hold ur patience man.

 

[Desmond]

[size=+2]Astrobiologists Find Ancient Fossils in Fireball Fragments[/size]

Images-

Spoiler

*www.technologyreview.com/sites/default/files/images/Polonnaruwa%20meteorite.png

"The results of these tests, which the Cardiff team reveal today, are extraordinary. They say the stones contain fossilised biological structures fused into the rock matrix and that their tests clearly rule out the possibility of terrestrial contamination."

- Source

Offtopic (Sort of on topic)- Has anybody here read Dan Brown's Deception Point ?

Yup, I have. And I know what you are thinking.

 

[icebags]

real surprise dude real surprise........................if it is true..........

btw dark matter mass can't be accurately measured.........

it can't be detected.....

ummm somebody care to explain me what this dark matter is, in simple terms ?

 

[Desmond]

NASA gets $75 Million for a mission to Europa.

*static.ddmcdn.com/gif/storymaker-top-10-places-to-find-alien-life3-1-660x433.jpg

There are few destinations in the solar system as enticing as Jupiter’s moon Europa. Below its icy crust a liquid water ocean is thought to exist, containing not only the necessary ingredients for life, but, according to scientists, potentially complex organisms. And now, despite a squeezed budget, it looks like NASA has been allocated the seed money for a mission to Europa.

Last week, President Barack Obama signed a resolution that was recently passed by the House and Senate outlining the extent of government funding for a range of science disciplines for the remainder of the fiscal year (until September 2013). But one line of the bill has drawn special interest from planetary scientists. On page 64, the bill (H. R. 933, PDF) says: “$75,000,000 shall be for pre-formulation and/or formulation activities for a mission that meets the science goals outlined for the Jupiter Europa mission in the most recent planetary science decadal survey.”
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Europa recently hit the headlines after planetary scientists, led by Caltech’s Mike Brown, uncovered the presence of magnesium sulfate salt — a.k.a. Epsom salt — on Europa’s surface. Through some clever chemistry detective work, the presence of magnesium sulfate is suggestive of a cycling of Europa’s salty ocean with the surface. This provides a tantalizing clue as the the cycling of nutrients through Europa’s crust, potentially supporting a sub-surface ecosystem.

Add that clue to the growing array of hints of the habitability of Europa and it becomes clear that more work needs to be done.

Source

I am anxiously waiting to find out what they'll find beneath the icy crust. Alien life perhaps

 

[RohanM]

Big asteroid swinging by Earth has its own moon

*www.thinkdigit.com/forum/random-news/174374-big-asteroid-swinging-earth-has-its-own-moon.html

 

[icebags]

saw this on youtube, if u see ultra bright meteorite /explosion flash outside, then stay away from windows for next few minutes till the aftershock is passed. or the glass will hit ur eyes.

Chelyabinsk meteor crash feb 2013:

 

[axes2t2]

Spoiler

*i.imgur.com/KhLthfE.jpg

Every time I read that,I laugh.