Expert Voices

There are some universal certainties. Death. Taxes. The second law of thermodynamics.

Is super asymmetry a thing? And do big physicists really travel economy class?

Mad scientists through the ages have dreamed of holding the world hostage by threatening to destroy the whole thing. Here's how that could work.

The IAU's achievements during its first few decades include resolving contradictory sets of names given to features on the Moon and Mars by rival astronomers during the previous few centuries.

Our senses are stuck in the past. There's a flash of lightning, and then seconds pass until we hear the rumble of distant thunder. We hear the past.

China just became the first country to land a probe on the far side of the moon. It's a technological achievement and another sign of China's capabilities and ambitions in space.

Brown dwarfs are cooler than stars but hotter than planets, and despite the name, they're not even very brown.

In the cosmos' most energetic events, we find some truly out-this-world methods of manufacturing radiation.

For the precocious hunter of off-Earth life, the Drake equation is the ever-ready, go-to toolkit for estimating just how (not) lonely humans are in the Milky Way galaxy. But it's not useful.

On Dec. 24, 1968, Bill Anders orbited the moon as lunar module pilot with the Apollo 8 crew on humanity's first voyage to another world.

George H.W. Bush's presidency came at a key turning point in NASA's history and ultimately contributed to the success of the International Space Station, NASA leadership and today's space policy.

The astronauts of Apollo 8 rode the chariot of history to take the first pictures of Earth from space fifty years ago.

Who wouldn't want to travel in time, glimpsing the dinosaurs or peeking at humans 2,000 years from now? Now physicists have designed a time machine that seems deceptively simple.

As comets blaze across the night sky, they can bring wonder and excitement to those watching from Earth – or even a sense of impending doom.

Magnets and the magnetic force are ubiquitous in our everyday lives, helping to guide us in unfamiliar territory and attach our kids' artwork to the fridge.

If you want to capture the attention of the next generation of scientists, try captivating them with the wonders of space.

Researchers discuss why alien life in our solar system looks likelier than ever.