The trans-Neptunian object Altjira, 44 times farther from the Sun than Earth is, could be the second known trinary, ...

Whatever hypothesis may ultimately be found to account for the present solar system, the Theory of Tidal Friction must therefore form a part of it. The physical basis of the theory is very simple.

Last month, the Dark Energy Spectroscopic Instrument (DESI) collective reported that dark energy is evolving—specifically ...

This theory was known as the heliocentric model ... Create your own masterpiece of the solar system. You could paint it, use different sized objects or draw it. Don't forget to label it and ...

a new theory now suggests that the cause could be a 2-50 Jupiter-mass object passing through the Solar System. To start with, the planets formed out of a rotating disk of gas and dust around the ...

It presents the evolution of the solar system through the lens of the planetesimal hypothesis, a theory suggesting that planets formed from small celestial bodies accumulating over time.