NASA Is Testing a Nuclear Battery That Could Last 433 Years

Spacecraft have used a plutonium isotope to stay afloat for decades, but another isotope could last even longer.

View in Browser  DIGITAL ISSUES GEAR REVIEWS SUBSCRIBE NASA Is Testing a Nuclear Battery That Could Last 433 Years Spacecraft have used a plutonium isotope to stay afloat for decades, but another isotope could last even longer. Read More Our All-Time Favorite Wheeled Power Station Is $1,000 Off. Here's Why You Shouldn't Miss Out. This is the lowest price we've seen all year. Read More An Amateur Archaeologist Found a 1,000-Year-Old Ring With Incredible Implications And it's still glistening. Read More A Strange New Rectangular Telescope Could Spot 25 Potentially Habitable Worlds Technological limitations for manufacturing large, round telescopes has experts considering unconventional shapes to improve our search for habitable worlds. Read More Always Know Who's On The Other Side of the Door With These Best-Tested Doorbell Cameras Protect your home with a live video feed of activity at your front door. Read More A Tiny 6G Chip Could Make Your Wireless Network 500x Faster Get ready for speed—lots of speed. Read More Need Assistance? Contact Us. Follow Us Unsubscribe | Privacy Notice | CA Notice at Collection Popular Mechanics is a publication of Hearst Magazines. ©2025 Hearst Magazine Media, Inc. All Rights Reserved. This email was sent by Hearst Magazines, 300 West 57th Street, New York, NY 10019-3779