I think you mean extrasolar planets. Technically, all planets except Earth are "extraterrestrial." At last report there were almost 900 of them, with more to follow. They aren't a "group" in the usual sense, just a category.
The inner planets, also known as rocky or terrestrial planets, do not have significant ring systems.
Nope. Unless exobiology is correct, in which case we're all extraterrestrial. no
These are the four outer planets, known as the gas giants. Jupiter, Saturn, Uranus and Neptune.
The gas giants.
4 planets
extraterrestrial...? wait, sorry, it's 'inferior planets'.
Mercury, Venus, Earth and Mars.
Extraterrestrial are unknown humans. They are humans, but different kinds from different planets. Like aliens and UFOs. The scientific community think this is true. They think they come from planets beyond Earth...
The four inner, or rocky planets, sometimes known as the terrestrial planets. These are closer to the sun and are hotter.
They search for extraterrestrial life on other planets.
Earth and Venus are nearly the same size.
The inner planets, also known as rocky or terrestrial planets, do not have significant ring systems.
At this time we have no evidence of any extraterrestrial life.
Extraterrestrial life is defined as life that does not originate from Earth. Life on other planets is a simpler way to word it. Aliens on other planets is an example (but I doubt aliens live on other planets) of extraterrestrial life. Also, bacteria are another example. There is proof that there was once water on Mars, and that there may have been bacteria living in that water. That bacteria would also be considered as extraterrestrial.
Nope. Unless exobiology is correct, in which case we're all extraterrestrial. no
Andromeda Survival Group, extraterrestrial civilization in Andromeda Galaxy.
These are the four outer planets, known as the gas giants. Jupiter, Saturn, Uranus and Neptune.