«Being hit by a 1 - centimetre object
at orbital velocity is the equivalent of exploding a hand grenade next to a satellite,» says Heiner Klinkrad, head of the space debris office at the European Space Agency in Darmstadt, Germany.
Not exact matches
Planet «c» or «2» - A residual drift in the radial
velocity data over several years suggest the presence of an even larger planet in an outer orbit,
at about 3.73 AUs from 47 UMa (between the average
orbital distances of Jupiter and the Main Asteroid Belt in the Solar System).
Subsequently, Heintz (1996, page 411) suggested that such a companion to Star Ba would have to have a mass of
at least half Sol's to reach detectable brightness, and that, among other
orbital requirements, Bc's period would have to be less than an Earth year in order to account for the absence of effects on Ba's radial
velocities and positions.
On March 4, 2014, a team of astronomers announced that analysis of new and older radial -
velocity data from nearby red dwarf stars revealed two super-Earths «b» and «c» with minimum earth - masses of 4.4 (+3.7 / -2.4) and 8.7 (+5.8 / -4.7), respectively,
at average
orbital distances of 0.080 (+0.014 / -0.004) and 0.176 (+0.009 / -0.030) AU, respectively, from host star Gl 682, with
orbital eccentricities of 0.08 (+0.19 / -.08) and 0.010 (+0.19 / -0.10) and periods around 17.5 and 57.3 days, respectively (UH news release; and Tuomi et al, 2014).
On March 4, 2014, a team of astronomers announced that analysis of new and older radial -
velocity data from nearby red dwarf stars revealed a planet with a minimum of 32 (max 49) Earth - masses
at an average
orbital distance of 0.97 AU from host star Gl 229, with an
orbital period around 471 days (UH news release; and Tuomi et al, 2014).
Gas traveling
at 200 km / sec [somewhere around our
orbital velocity in your path around the Milky Way galaxy] has nothing to do with it's temperature.