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Message Subject SCIENCE GUY EXPLAINS HOW IT'S POSSIBLE AN UNDISCOVERED BROWN DWARF STAR CAN EXIST In OUR SOLAR SYSTEM
Poster Handle Anonymous Coward
Post Content
What this means to any 'lurking' brown star in our system, it would leave a decided gravitational wake, which would perturb the orbits of planets around the whole system in a manner that would pretty much pinpoint the location of a massive body.

Secondly, they are not black bodies, they do radiate and reflect electromagnet energies across a wide spectrum including light. Yes it is possible to have missed a large body with optics even today in the outer solar system, however the mapping of the whole of space with radio telescopes has been done and continually gets updated all the time.

A near brown dwarf would have signaled its presence via radio waves. And yes there are amateur radio astronomers out there.

Yes over long distances their radio power is too low to pick up more than the faintest of signals. However anything within the solar system is close enough to be detected.

We can still pickup the signals of Voyager craft and their transmissions are infinitesimally small compared to what a modest small brown dwarf can produce.
 Quoting: Aradzell


You're forgetting the 3600 orbit. It could be 1800 years away from us which is well beyond Pluto's orbit.
 Quoting: Anonymous Coward 46411671

Let's do some math about the 3,600 year orbit.

There is a simple formula that gives us the semi major axis when we know the orbital periode:

p^2 = a^3 with p = orbital periode in years and a = semi major axis in AU

a = (p^2)^1/3 = (3600^2)^1/3 = 12,960,000^1/3 = 234.9
Thus the semi major axis of Nibiru is 234.9 AU.

Since we know that it comes close to Earth at it's perihelion, we know the aphelion distance: 2 * 234.9 - 1 = 468,8 AU.

Sedna, a dwarf planet the size of about 1,000 km, was discovered when it was at a distance of 100 AU.
Now imagine a brown dwarf star 280 times the size of Sedna (280,000 km) at, in the worst case (furthest distance from the sun), only 4.5 times the distance away.

Easy to spot only by reflected sun light - even for amateur astronomers.



How many light years are 468,8 AU? - 0.0000158 light years.

OK, the brown dwarf in the picture below, imaged by Dr. Astro in the infrared spectrum, is 12 light years away.

:teegarden1:

.
 Quoting: Hydra


Well what if the local brown dwarf was a black body? Yanno, eatting light?
 
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