How many planets are there in our solar system?

The correct answer is eight, reflecting the current classification of planets in our solar system. The planets recognized today are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Each of these celestial bodies meets the criteria set by the International Astronomical Union (IAU) for planet status, much of which pertains to the body’s ability to orbit the Sun, have sufficient mass for a nearly round shape, and have cleared its orbit of other debris.

Historically, there were nine recognized planets, including Pluto, which was considered the ninth until 2006 when it was reclassified as a "dwarf planet" due to not meeting the criteria for full planet status. This redefinition has led to the consensus that there are now only eight recognized planets in our solar system. The change in classification highlights the evolving nature of scientific understanding in astronomy.