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...eous [[protoplanetary disk]] around the young star. This may give birth to planets in certain circumstances, which are not well known. Thus the formation of p ...planetary embryos go through a stage of violent mergers, producing a few [[terrestrial planet]]s. The last stage takes around 100 million to a billion years. ...

| title=Are beryllium abundances anomalous in stars with giant planets? ...and so it is thought to be less likely to host [[terrestrial planets|rocky planets]]. Observations have detected more than 10 times as much dust surrounding T ...

...small terrestrial planets remains a possibility, the existence of massive planets has been largely discounted, and Van de Kamp's specific claims overturned. ...were apparently refined in a 1969 paper. Later that year he suggested two planets of 1.1 and 0.8 Jupiter masses.<ref>{{cite journal | author = Van de Kamp, P ...

...e dawn of the [[space age]] in the 1950s and the discovery of [[extrasolar planets]] in the 1990s, the models have been both challenged and refined to account ...ution of the solar system. The positions of the planets often shifted, and planets have switched places.<ref name="Gomes"/> This [[planetary migration]] now i ...

...planetary orbits are close to face-on as observed from Earth, more massive planets could have evaded detection by the radial velocity method.</ref> The detect | url=http://solarsystem.nasa.gov/planets/profile.cfm?Object=Sun&Display=Facts&System=Metric ...

...strial planets]], are primarily composed of rock and metal. The four outer planets, [[Jupiter]], [[Saturn]], [[Uranus]] and [[Neptune]], also called the [[gas ...ugh to have been rounded by their own gravity, and are thus termed [[dwarf planets]]. The hypothetical [[Oort cloud]], which acts as the source for [[long-per ...

...}}</ref> Even if intelligent life occurs on only a minuscule percentage of planets around these stars, there should still be a great number of civilizations e ...izations. The fundamental problem is that the last four terms (fraction of planets with life, odds life becomes intelligent, odds intelligent life becomes com ...

| adjectives = Terrestrial, Terran, [[Terra (mythology)|Telluric]], Tellurian, Earthly ...arth''' is the third [[planet]] from the [[Sun]], and the largest of the [[terrestrial planet]]s in the [[Solar System]] in terms of [[diameter]], [[mass]] and [[ ...

| url = http://solarsystem.jpl.nasa.gov/planets/profile.cfm?Object=Mars&Display=Facts&System=Metric Mars is a [[terrestrial planet]] with a thin [[atmosphere]], having surface features reminiscent bo ...

| title=A Field Guide to Stars and Planets === Possible planets === ...

...though observing such redshifts, or complementary blue shifts, has several terrestrial applications (e.g., [[Doppler radar]] and [[radar gun]]s),<ref>See Feynman, ...re one way astronomers have been able to [[Methods of detecting extrasolar planets#Radial velocity|diagnose and measure]] the presence and characteristics of ...

...appeal to various exotic physical phenomena that have not been observed in terrestrial laboratory experiments or incorporated into the [[Standard Model]] of [[par ...est that ultimately [[galaxy groups and clusters|galaxy clusters]], stars, planets, atoms, nuclei and matter itself will be torn apart by the ever-increasing ...