Rachael Rettner

A famous equation used in the search for alien life has inspired a new model that estimates the risk of COVID-19 transmission.

That may be true for the short missions astronauts have gone on so far. But Mars will be a different story.

Renowned physicist Stephen Hawking turns 76 today, reaching an age well beyond what was expected when he was diagnosed with ALS decades ago.

Astronauts who spend prolonged time in space experience noticeable changes to their brain's structure, a new study finds.

A couple in South Carolina has filed a lawsuit against Amazon, alleging that the company sold faulty solar eclipse glasses that did not adequately protect their eyes during last week's eclipse.

Some eclipse watchers reportedly put sunscreen on their eyeballs during last week's eclipse.

Many watchers of today's solar eclipse may have glanced at the sun without proper eye protection. But how do you know if you've hurt your eyes?

In an effort to find new treatments for Parkinson's disease, researchers are sending their experiments to space.

During next month's solar eclipse, you may be tempted to gaze directly at the sun, but you absolutely should not do this without the proper eye protection.

On long-term space missions, such as missions to Mars, having an extrovert on board could have several disadvantages, a new study suggests.

Cosmic radiation from space travel may increase the risk of colon cancer.

A long journey in space may actually compromise the immune system and make astronauts more susceptible disease.

Medications used to treat astronauts in zero gravity might not work as well as they do on Earth.

Even during low points in the Sun's solar cycle, solar winds still bombard the Earth, a new study finds