The planets in our Solar System have existed pretty much as long as the Solar System - about 4.6 billion years. Planets in other, older, solar systems may have existed quite a bit longer - almost as long as the Universe (which is 13.8 billion years old).
We determine which planets exist by observing them directly with telescopes or indirectly through methods like detecting their effects on nearby stars. To identify planets that likely no longer exist, scientists look for evidence of their past presence, such as remnants like asteroid belts or debris disks that may indicate the former presence of a planet.
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.
Probably, but impossible to tell as we are only just seeing planets within our own galaxy.
No. Planets are formed after stars are and in most cases planets are consumed by the same star. Some stars can exist long after they have exhausted their supply of hydrogen and heavier element as red giants. Some even may last over 100 of trillions of years.
The outer planets take longer.
This question would not exist!
no fairies don't exist any where..
It obviously does.
planets sun very long time
No, they exist on the planets Venus and Mars as well as Io, a moon of Jupiter.
No one knows
We determine which planets exist by observing them directly with telescopes or indirectly through methods like detecting their effects on nearby stars. To identify planets that likely no longer exist, scientists look for evidence of their past presence, such as remnants like asteroid belts or debris disks that may indicate the former presence of a planet.
The Gaseous Planets The Planets That Are So Far Away That We Don't Even Know If Life Could Exist There (TPTASFATWDEKILCET) :) ;)
Currently there are 353 known extrasolar planets (that is to say, outside of our solar system), but it is unknown how many planets exist in the universe.
Mainly inside of galaxies.
Life probably does not exist on any of the known planets (except earth). But if life does exist on one of those planets, it would probably be on Mars. Venus is way too hot, Mercury does not have an atmosphere, and the other four planets are made up almost entirely of gas.
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.