Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

Gravity provides the force needed to maintain the stable orbit of planets around a star and also of moons and artificial satellites around a planet. The moons around planets in the Solar System ...

The Prevalence of Direct Motion in the Solar System. On all of the theories of the origin of the solar system that have here been described it is necessary that the planets should revolve in the ...

The second problem is that assuming the sun to be the solar system’s centre of gravity also means assuming the sun itself to be stationary. This means that the sun’s own motion can’t be ...

The Solar System’s closest approach to Radcliffe ... His team reconstructed the past motion of 56 young star clusters that trace the Radcliffe wave, using their trajectories to infer the ...

In late 2017, a mysterious object tore through our solar system at breakneck speed ... first wave of ISO-hunting missions is already in motion: NASA's mission concept is called Bridge and the ...

Tatooine-Like Planet Outside the Solar System May Orbit Two Failed Stars ... In a new analysis, researchers found that the brown dwarfs' motion was changing — a quirk that's less likely to ...

Save guides, add subjects and pick up where you left off with your BBC account. The Sun and its planets – Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune The different planets ...