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/sci/ - Science & Math

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Anonymous Fri May 31 00:53:14 2013 No.5799186 [Reply] [Original]

>Asteroid to fly by Earth in a couple of days
>recently found that the 2 mile asteroid has a small moon orbiting it.

http://solarsystem.nasa.gov/news/display.cfm?News_ID=43790

How big does something have to be before something starts actually orbiting it?

>>	Anonymous Fri May 31 00:54:28 2013 No.5799187 Big enough.

>>	Anonymous Fri May 31 01:00:27 2013 No.5799200 Your mom orbits taco bell.

>>	Anonymous Fri May 31 01:03:43 2013 No.5799208 Literally anything with mass has the potential for something to fall into its gravity well and sustain orbit.

>>	Anonymous Fri May 31 01:08:13 2013 No.5799214 I always wondered about this. Does every object in space have a satellite, which in turn has a smaller satellite, and so on until the EM force starts to overpower Gravity?

>>	Anonymous Fri May 31 01:19:28 2013 No.5799234 >>5799200 This was a greater comment than some of the shit that people had during the live chat that was going on when NASA JPL was doing a briefing on the asteroid. People actually thought it was big enough to disrupt Earth's orbit around the sun.

Anonymous Fri May 31 01:32:28 2013 No.5799259
File: 222 KB, 1280x720, website.jpg [View same] [iqdb] [saucenao] [google]

I am actually going to keep /sci/ relevant here and give you the necessary tools to get a better experience of 1998 QE2.

this is a screenshot of the info you'll need if you hope to follow the asteroid's fly-by online.

and here's a website if you want to do a "ride-along" tour with the asteroid (or any celestial object anywhere in the universe). http://eyes.nasa.gov/

Keep in mind that if you're hoping to view 1998 QE2 from your backyard, you'll need a pretty decent telescope (about 8" lense or greater) and it will be visible in the southern hemisphere (with a slight chance of visibility as far north as Los Angeles)

>>	Anonymous Fri May 31 01:58:13 2013 No.5799309 File: 14 KB, 254x314, 1328929841984.jpg [View same] [iqdb] [saucenao] [google] >>5799234 really? >mfw

>>	Anonymous Fri May 31 02:30:57 2013 No.5799368 >>5799309 seriously. just goes to show that not everyone who watches the science channel (or other related programs/networks) is intelligent.

>>	Anonymous Fri May 31 02:37:12 2013 No.5799374 could you get an apple or something small to orbit around a big ass ball of lead or something, such that the proportions are like that of the earth and the moon?

>>	Anonymous Fri May 31 02:38:43 2013 No.5799379 Everyone's going nuts over a meteor that flew by Ohio, Illinois and Indiana right now. Reports from over 1/3 of the country coming in from California to New York.

>>	Anonymous Fri May 31 02:39:59 2013 No.5799382 >>5799374 If you launched it into space, yes ... until the gravity of another celestial body would pull it towards it. You obviously couldn't just throw the two up in the air outside - the Earth's gravity will keep drawing them back down.

>>	Anonymous Fri May 31 02:51:12 2013 No.5799407 >>5799186 >How big does something have to be before something starts actually orbiting it? Theoretically, it has to exist.

>>	Anonymous Fri May 31 02:57:29 2013 No.5799419 Does this one have a chance to bring little asteroids like the last one did in feb?

>>	Anonymous Fri May 31 02:57:44 2013 No.5799420 >>5799382 What if they were both levitated somehow on earth?

>>	Anonymous Fri May 31 03:07:13 2013 No.5799430 Any chance of pieces of QE2 breaking off and hitting earth?

Anonymous Fri May 31 03:08:42 2013 No.5799432

>>5799420
If you could suspend them in the air (like how a helicopter can hover in one spot), the apple still would not orbit the lead sphere. Earth's gravity would still be the stronger force and pull them downward.

Gravity is the big player in our universe. Our moon orbits the earth, the earth orbits the sun. Our solar system orbits around the center of the Milky Way.... And our galaxy and our neighboring galaxy (Andromeda) are drawing each other with the force of their gravity. The two will collide into one giant galaxy eventually.

>>	Anonymous Fri May 31 03:11:43 2013 No.5799435 >>5799430 Nope. QE2 is only about 1.7 miles in diameter and it will be passing by the earth at 15 lunar distances from earth - that's 15 times the distance of the moon from the earth.

>>	Anonymous Fri May 31 03:15:13 2013 No.5799440 >>5799435 The last one that came close did that though some pieces hit Russia and tonight they are reports country wide of a meteor (fireball) seen from coast to coast. ??

Anonymous Fri May 31 03:21:28 2013 No.5799449

>>5799440
the thing about that meteor was that it kind of came out of nowhere - no one really expected it. QE2's path is already plotted out, and the math doesn't lie. Look up Kepler's laws - he invented the laws used by NASA when plotting trips to other planets. The universe is like clockwork - you can predict where planets will be at any point in time - as long as you know about them, that is.

>>	Anonymous Fri May 31 03:33:28 2013 No.5799465 >>5799449 I don't see what that has to do with pieces breaking off and hitting earth like the other one did. It's suspicious that this big ass meteor is fucking our shit right now too.

>>	Anonymous Fri May 31 03:38:12 2013 No.5799468 >>5799465 the one that broke off and hit Russia was much closer. this one is so far away it only looks like a faint star on the Hubble telescope.

Anonymous Fri May 31 04:05:58 2013 No.5799511

To answer the question, all mass has a gravitational pull the strength is determined by how much mass there is and the distance from the object (inverse square law), the earth and the moon for example, actually orbit each other, favouring the earth thought as it has greater mass, the center of the moons orbit is not the centre of the earth. Any mass suspended in space will influnce any other other mass gravitational potential energy between two bodies = ((mass1xmass2xgravitational constant)/(distance between them^2)

>>	Anonymous Fri May 31 04:12:13 2013 No.5799522 >>5799186 >over 2k km away >fly by Earth ok

>>	Anonymous Fri May 31 04:23:28 2013 No.5799539 >>5799511 It's not mass that determines gravity yo. > photons are massless and exert gravitational pull Google is that way so you can figure out what the real factors are.

>>	Anonymous Fri May 31 14:08:51 2013 No.5800426 bump

>>	Anonymous Fri May 31 14:18:50 2013 No.5800439 >>5799539 >Implying what he said isn't an acceptable approximation

Anonymous Fri May 31 14:24:21 2013 No.5800449

I personally think that if we do:
<div class="math">
V(X,Y,Z)=-G_{p} \int_{-D}^{D}\int_{-B}^{B}\int_{-L}^{L}\frac{dx'dy'dz'}{\sqrt{(X-x')^{2}+(Y-y')^{2}+(Z-z')^{2}}}
</div>
we can find out what the gravitational potential energy is then explode it and take the log then exponentiate.

>>	Anonymous Fri May 31 14:46:20 2013 No.5800501 THE DIVINE PUNISHMENT SHALL FINALLY FALL ON EARTH

>>	Anonymous Fri May 31 14:55:05 2013 No.5800518 File: 28 KB, 500x445, 1367265076383.jpg [View same] [iqdb] [saucenao] [google] Electrons orbit a atom's nucleus. Size doesn't matter

>>	Anonymous Fri May 31 15:37:35 2013 No.5800617 >>5800518 >Electrons orbit a atom's nucleus. 1) They don't. Orbital =/= orbit. 2) It has nothing to do with gravity, in any case. Electromagnetism is much much much much stronger than gravity.

>>	Anonymous Fri May 31 16:34:15 2013 No.5800789 (r^3/T^2) of the asteroid's moon would be interesting

>>	Anonymous Sat Jun 1 00:39:22 2013 No.5801712 As big as yer mum.

>>	Anonymous Sat Jun 1 02:32:38 2013 No.5801929 >>5800617 This. Electromagnetism is actually a key player in some of the multiverse theories.>>5800617

>>	Anonymous Sat Jun 1 02:34:08 2013 No.5801931 >>5800617 This. Electromagnetism is actually a key player in some of the multiverse theories.

>>	Anonymous Sat Jun 1 02:35:23 2013 No.5801932 >>5801931 Sorry for the double post. I'm using my phone right now.

>>	Anonymous Sat Jun 1 03:15:08 2013 No.5801971 can a moon have its own moon? what happens if a moon made of fire crashes into a moon made of ice?

>>	Anonymous Sat Jun 1 03:18:22 2013 No.5801975 >>5799186 >Asteroid to fly by Earth in a couple of days >in a couple of days It already happened >>5800822

Anonymous Sat Jun 1 03:22:21 2013 No.5801979

>>5801971
if the distances are adequate.. and teh outside gravitational pull low enough, you can think of earth as a moon of the sun.. ect. but our moon would never have a moon because the earths gravitational pulls would capture it and throw it into either another orbit like the first moon or crash it into the moon eventually.

>>	Anonymous Sat Jun 1 03:45:52 2013 No.5801991 >>5801932 Apology not accepted. Swerve into oncoming traffic as your penance.

>>	Anonymous Sat Jun 1 04:26:07 2013 No.5802035 >>5801991 >Implying I was driving rather than not having a computer readily available.

>>	Anonymous Sat Jun 1 05:26:22 2013 No.5802074 >>5799186 >How big does something have to be before something starts actually orbiting it? Not big if the distances are right. In zero G, even two marbles would orbit each other over long enough time.

>>	Anonymous Sat Jun 1 05:33:07 2013 No.5802081 >>5799214 I don't think the EM force overpowering gravity is what prevents a satellite. Isn't it just that the mass is too small to produce a big enough gravitational (and centripetal) force between the two bodies?

>>	Anonymous Sat Jun 1 05:53:48 2013 No.5802093 Don't electrons orbit around a nucleus? The real question is, how small does something have to be before something starts orbiting it?

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