Discover the secrets of Trans-Neptunian Objects (TNOs) and their pivotal role in unraveling our solar system's history. Explore their mysteries and significance through pioneering missions and advanced observations.
Tomorrow, December 19, 2022, a visitor from nearly a light-year away will come closest to the Sun (perihelion) after several million years of travel through the Oort Cloud. This visitor is recently discovered comet C/2017 K2 (PANSTARRS).
The following is a huge infographic showing the true scale of the solar system with all its planets, minor bodies and the most famous probes we have sent out into deep space. Scientists measure distances in our solar system in astronomical units (AU).
Comet Hartley 2 has made it to the news recently: first because of the comet's flyby near Earth and then due to it being visited by the Deep Impact spacecraft.