Mars - Basic astronomical data | Britannica
A New World's Extraordinary Orbit Points to Planet Nine | WIRED
Planet with most eccentric orbit flashes astronomers with reflected light – Astronomy Now
Astronomers Discover Planet with Largest Orbit Ever | Sci-News.com
Astronomers Have Found Another Possible 'Exomoon' beyond Our Solar System - Scientific American
An 8th Planet Is Found Orbiting a Distant Star, With A.I.'s Help - The New York Times
A Super-Earth May Orbit Proxima Centauri, the Closest Star to the Sun
Martian moon's orbit suggests the Red Planet had a ring | Space
We've found an exo-planet with an extraordinarily eccentric orbit
New-Found Dwarf Planet Points to Solar System's Chaotic Past - Eos
Is a planet's orbital period related to the planet's size? | Socratic
File:Planet Nine Orbit.svg - Wikimedia Commons
New Clue to “Planet Nine” – Hubble Pins Down Weird Exoplanet With Far-Flung Orbit
The planets that orbit a backward-spinning star
ViewSpace | Exoplanet Diversity: Orbital Distance
New Study Knocks Theory of Planet Nine's Existence Out of Orbit | Smart News| Smithsonian Magazine
For life to form on a planet it needs to orbit the right kind of star
Newfound Alien Planet Has a Bizarre Looping Orbit - Scientific American
What Would it Be Like if Earth Changed its Orbit? » Science ABC
TESS discovers its third new planet, with longest orbit yet | MIT News | Massachusetts Institute of Technology
Hubble Pins Down Weird Exoplanet with Far-Flung Orbit – Exoplanet Exploration: Planets Beyond our Solar System
Saturn overtakes Jupiter as planet with most moons - BBC News
This weird 'whiplash' planet is unlike anything astronomers have ever seen
Why do the planets in the solar system orbit on the same plane? | Live Science
