Mark Kelly

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Mark Kelly - Total results - 5
NASA studying potential risks of long-duration spaceflight with astronaut twins
science

NASA studying potential risks of long-duration spaceflight with astronaut twins

Scott Kelly, one of the astronaut test subjects, spent 340 days in the International Space Station.

Year in space puts astronaut's immune system on high alert, changes gene activity
science

Year in space puts astronaut's immune system on high alert, changes gene activity

These changes are raising new questions for doctors as the space agency aims to send people to Mars.

In a presidential first, Trump wants to usher in military 'Space Force' by 2020
News & Analysis

In a presidential first, Trump wants to usher in military 'Space Force' by 2020

Fundraising emails for his reelection asked supporters to pick a Space Force logo for campaign merchandise.

Endeavour Just Hours Away From its Final Launch
News & Analysis

Endeavour Just Hours Away From its Final Launch

The countdown for Endeavour's launch will go off shortly.