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(Phys Org2)   New planet-weighing technique found, just in time for our obesity epidemic   (phys.org) divider line 19
    More: Cool, planets, scientific technique, planetary systems, spectrographs, radial velocity, Leiden, particle displacement, Very Large Telescope  
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833 clicks; posted to Geek » on 27 Jun 2012 at 5:38 PM (1 year ago)   |  Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



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2012-06-27 05:05:41 PM
by studying the planet's orbital motion through the displacement of spectral lines of carbon monoxide, the team was able to calculate its exact mass

Alien math now?
 
2012-06-27 05:58:54 PM
Time for me to bust out an old joke from a headline I submitted years ago that never got approved:

Planet claims weight inaccurate because it had its shoes on.
 
2012-06-27 05:59:23 PM
The Earf is just retainig water, Amirite?
 
2012-06-27 06:03:18 PM
Submitter, your mother is so fat she was weighed using the carbon dioxide atmosphere that follows her

your mom is so fat she was added to the count of exo planets
 
2012-06-27 06:08:31 PM
MNPWTIU
 
2012-06-27 06:20:27 PM

loonatic112358: Submitter, your mother is so fat she was weighed using the carbon dioxide atmosphere that follows her

your mom is so fat she was added to the count of exo planets


Yo mama so fat she has smaller fat mamas floating around her in ellipses
 
2012-06-27 06:25:20 PM

Sgygus: by studying the planet's orbital motion through the displacement of spectral lines of carbon monoxide, the team was able to calculate its exact mass

Alien math now?


All maths are alien to me.
 
2012-06-27 06:29:49 PM
The planet is called Tau Boo b, located in the constellation of Bootes, and it orbits a star about 50 light years from Earth that's bright enough to be visible to the naked eye.

I am in third grade because all I read there was Boob, Booties, and naked.
 
2012-06-27 06:36:46 PM
The planet is called Tau Boo b, located in the constellation of Bootes, and it orbits a star about 50 light years from Earth that's bright enough to be visible to the naked eye.

collider.com
 
2012-06-27 06:47:03 PM

Fano: loonatic112358: Submitter, your mother is so fat she was weighed using the carbon dioxide atmosphere that follows her

your mom is so fat she was added to the count of exo planets

Yo mama so fat she has smaller fat mamas floating around her in ellipses


...mama... MAMA ...mama...


/amidoinitrite
 
2012-06-27 06:52:28 PM
Anybody cares to explain the method?

I tried Google but didn't find anything.
 
2012-06-27 07:13:42 PM

traylor: Anybody cares to explain the method?

I tried Google but didn't find anything.


First you get a reaaaallly big scale, then some gravity...
 
2012-06-27 07:35:44 PM

traylor: Anybody cares to explain the method?

I tried Google but didn't find anything.


They found the planet's orbit by watching where the CO went. Once you have the orbital period, finding the mass is pretty trivial (assuming you know the star's mass).
 
2012-06-27 08:35:19 PM

Fano: loonatic112358: Submitter, your mother is so fat she was weighed using the carbon dioxide atmosphere that follows her

your mom is so fat she was added to the count of exo planets

Yo mama so fat she has smaller fat mamas floating around her in ellipses


Yo mama is so fat she has a Lagrange point between her and the earth.
 
2012-06-27 08:49:48 PM

hawcian: traylor: Anybody cares to explain the method?

I tried Google but didn't find anything.

They found the planet's orbit by watching where the CO went. Once you have the orbital period, finding the mass is pretty trivial (assuming you know the star's mass).


My impression was that they already knew the orbital period based on the star's wobbling. And I may be wrong, but I think that you can calculate the planet's mass only if you know the orbit time, the orbit radius, and the mass of the star.
 
2012-06-27 09:44:32 PM
Knowing a body's mass is essential...to determine whether it is rocky and possibly habitable or large and gassy.

This technique was first created for use on dating sites and only later adapted for hunting exoplanets.
 
2012-06-27 10:10:16 PM
All planets weigh the same. Nothing. They're in free fall. Mass, on the other hand...
 
2012-06-28 09:30:28 AM

Tommy Moo: I am in third grade because all I read there was Boob, Booties, and naked.


I don't understand how this got posted to Fark without a Boo-b headline.
 
2012-06-28 09:37:22 AM

hawcian: They found the planet's orbit by watching where the CO went. Once you have the orbital period, finding the mass is pretty trivial (assuming you know the star's mass).


Not quite. They got the orbital radial velocity off of the CO doppler shift. Orbital period alone isn't sufficient to determine the mass of a planet with an arbitrary inclination and eccentricity. In fact, even with both period and velocity, you still need to know inclination to determine the mass, which is why astronomers often report the product of mass and sine(inclination) instead of mass alone. (Stellar "wobbling" from a sufficiently massive/close planet can help to pin down the inclination, if available.)
 
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