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.
Nope. Unless exobiology is correct, in which case we're all extraterrestrial. no
Planets located in the habitable zone of their star (where liquid water can exist), planets with rocky compositions, planets orbiting stable stars, and planets with atmospheres that could support life would be the best candidates to search for extraterrestrial life.
There is currently no definitive evidence of aliens on other planets. Scientists are actively searching for signs of extraterrestrial life through projects like the Search for Extraterrestrial Intelligence (SETI), but as of now, we have not found concrete proof of alien existence.
The first group of planets in our solar system, known as the terrestrial or inner planets, are Mercury, Venus, Earth, and Mars. They are characterized by their solid rocky surfaces, smaller size, and closer proximity to the sun compared to the outer gas giants.
The inner planets, also known as rocky or terrestrial planets, do not have significant ring systems.
The group of planets known as the terrestrial planets includes Mercury, Venus, Earth, and Mars. These planets are closer to the Sun and have solid, rocky surfaces.
extraterrestrial...? wait, sorry, it's 'inferior planets'.
We believe in the existence of extraterrestrial life because of the vastness of the universe, the discovery of planets in habitable zones, and the possibility of similar conditions to Earth on other planets.
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.
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
Planets located in the habitable zone of their star (where liquid water can exist), planets with rocky compositions, planets orbiting stable stars, and planets with atmospheres that could support life would be the best candidates to search for extraterrestrial life.
Andromeda Survival Group, extraterrestrial civilization in Andromeda Galaxy.