The curious minds at What If investigate the cosmic chaos if Venus and Mars suddenly swapped orbits, revealing the dramatic effects on climate, gravity, and planetary ecosystems.

For nearly a century, astronomers have watched galaxies spin and the universe expand in ways that visible matter alone cannot ...

We experience the flow of time because it’s a natural outcome of the basic laws of physics. But we may need to build a whole ...

Satellites and spacecraft in the vast region between Earth and the moon and just beyond—called cislunar space—are crucial for ...

Gravity is the unseen force that shapes the universe, yet we rarely give it much thought. First explained by Sir Isaac Newton, it is the pull that draws objects toward one another based on their mass ...

A new probe in development known as GIRO represents a low-cost step toward unlocking the secrets of the outer planets, all through the invisible pull of gravity. When you purchase through links on our ...

Legend has it that Isaac Newton had the moment of inspiration that would lead to his theory of gravity when, on a warm afternoon, he saw an apple fall from a tree and wondered why it should fall down ...