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1199918.  Tue Jul 26, 2016 10:11 am Reply with quote

Q: Around what does Jupiter orbit?

A: A point about 1.07 solar radii from the centre of the Sun

Due to Jupiter's mass being so large it and the Sun co-orbit a common point just above the Sun's surface

Bonus Orbit Fact! Buzz Aldrin was known as Dr Rendezvous during his Gemini/Apollo days because of his obsession with orbital dynamics (and his sideline as a groove/funk DJ)

Ian Dunn
1201710.  Mon Aug 15, 2016 10:33 am Reply with quote

There are reports of an Earth-like planet orbiting around Proxima Centauri, the closest star to Earth other than the Sun. Reports however do come from an unnamed source however, so I'm not sure how true this is.

One thing I was able to was some calculations. The New Horizons probe took about 9.5 years to get from Earth to Pluto. A probe travelling at a similar speed towards this supposed planet would take over 50,000 years.


Janet H
1206032.  Sun Sep 25, 2016 6:50 am Reply with quote

Honorable mention to the Kepler Orrery

1218700.  Fri Dec 30, 2016 8:00 pm Reply with quote

Janet H wrote:
Honorable mention to the Kepler Orrery

A friend builds orreries out of meccano. He's done loads, not just of our solar system, but others too such as mu Arae, though obviously they are based on current knowledge, so we don't yet know if any of those extrasolar planets have moons or whatever. The wide range of gears in meccano means that the ratios can be made to be very close to the actual ones. This one is of Kepler 11:

1234586.  Tue Apr 18, 2017 11:00 am Reply with quote

Kepler's elliptical orbit theory didn't exactly explain Mercury's orbit and so it was theorised by Urbain Le Verrier that there was an extra planet that he named Vulcan, the inspiration for the Star Trek species

1234599.  Tue Apr 18, 2017 11:43 am Reply with quote

Yes - and several people claimed to have seen it! So either simple observational bias - expecting to see something and therefore 'seeing' it, or possibly a sungrazing comet. I suggest the former.


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