Two in our own solar system, and nearly 1,000 in orbit around other stars.
With a telescope....
The new planets are named after the Kepler Space Telescope, which was a NASA mission that searched for exoplanets using the transit method. The telescope discovered thousands of exoplanets during its mission.
The surprising thing to me is how MANY extra-solar planets have been discovered. Considering the limitations of the Kepler Space Telescope's design, this indicates that there may be planets around a majority of the stars.
There is a bit of confusion here. Kepler is not the name of a planet but of a space telescope used to discover planets in other solar systems. Planets discovered with this telescope are given designations such as Kepler-22b. This telescope has been used to discovered hundreds of planets.
Ancient India discovered only 5 planets without a telescope, because they could see the planets with their eyes, just as we can. Those planets are:MercuryVenusMarsJupiterSaturn
Some sort of telescope was involved in the discovery of ALL known planets - about a thousand, at the time of this writing - with the exception of the five planets that can be seen with the naked eye.
Mars was discovered long before telescopes were invented. It is one of the classical planets, discovered in ancient times.
The Kepler space telescope was launched by NASA in 2009 to search for exoplanets. The telescope discovered thousands of new planets during its mission, which ended in 2018. The discoveries made by the Kepler mission were a collaborative effort involving many scientists and researchers.
The Kepler Telescope has discovered over 2,600 confirmed exoplanets during its mission, which began in 2009 and concluded in 2018. Its primary aim was to identify Earth-sized planets in the habitable zones of their stars. The data collected has significantly advanced our understanding of planetary systems beyond our own.
yes as you know we use the telescope to see other planets. since we had the telescope, we have discovered five new planets in our solar system which lay beyond pluto
Neptune was discovered using a telescope.Uranus was discovered with the naked eye, but because of it's slow rotation it was believed to be a star. Only with a telescope was it identified as a planet.
Yes, Mercury, Venus, Mars, Jupiter and Saturn had been discovered several millennia before the invention of the telescope.