IE 11 is not supported. For an optimal experience visit our site on another browser.
  • UP NEXT

    Could Dyson spheres exist in our galaxy?

    05:08
  • 17-year-old works to detect wildfires with rocket and drone system

    01:17
  • Concrete made from sugarcane could help fight climate change

    05:15
  • World's smallest pacemaker gives new hope to babies with heart defects

    01:43
  • Severe solar storm will bring beauty in the sky and potential disruptions

    01:27
  • NASA scrubs Boeing’s Starliner launch

    03:23
  • See Kate the Chemist make a rain cloud in a jar in Studio 1A!

    05:38
  • Worsening allergies tied to climate change and severe weather

    02:02
  • Coral scientists explain how coral bleaching happens

    02:15
  • Millions gather to celebrate solar eclipse along path of totality

    03:05
  • Meet the woman who has seen 21 solar eclipses

    02:23
  • Scientists will use total solar eclipse to study the sun's corona

    05:16
  • Teacher makes good on decades-old promise to watch eclipse with former students

    02:57
  • Timelapse videos show darkness of solar eclipse totality

    01:03
  • Special report: Solar eclipse path of totality

    01:44:40
  • Watch emotional moments as skywatchers view solar eclipse

    03:15
  • Gadi Schwartz reports on eclipse totality from plane above Arkansas

    06:04
  • Total eclipse reaches last stop in the U.S. in Maine

    04:11
  • 'So memorable': New Yorkers, tourists gather in midtown Manhattan for partial eclipse viewing

    02:27
  • 'Like a cool summer night': Temperature drops as eclipse hits Cleveland

    04:13

Planets align in rare triangular formation

00:15

Venus, Jupiter and Mercury were all visible in a near-perfect triangle Monday evening after sunset. NBC’s Brian Williams reports.