Tonight's Sky
Sun
Sun
Moon
Moon
Mercury
Mercury
Venus
Venus
Mars
Mars
Jupiter
Jupiter
Saturn
Saturn

Tonight's Sky — Change location

OR

Searching...

Tonight's Sky — Select location

Tonight's Sky — Enter coordinates

° '
° '

Is radiation beneficial?

Everything in moderation — even radioactivity.
berman

If we’re ever to colonize other planets, we’ll have to deal with increased radiation environments. Starting in 1969, 24 astronauts ventured beyond Earth’s atmosphere and magnetosphere, leaving behind all layers of cosmic ray protection. U.S. astronaut Shannon Lucid cites this hazard as the biggest challenge for manned space exploration.

It may already have cost some astronauts their lives. Five of the original space pioneers have died of cancer. Alan Shepard publicly wondered if his Apollo radiation exposure had given him the leukemia that ultimately killed him. And studies show that radiation is particularly bad for the heart.

Astronomy
magazine subscribers can read the full article for free. Just make sure you're registered with the website.

Already a subscriber? Register now!

Registration is FREE and takes only a few seconds to complete. If you are already registered on Astronomy.com, please log in below.
ADVERTISEMENT

FREE EMAIL NEWSLETTER

Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. View our Privacy Policy.

ADVERTISEMENT
ADVERTISEMENT
Apollo_RightRail

Click here to receive a FREE e-Guide exclusively from Astronomy magazine.

Find us on Facebook