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The progression of the solar eclipse over Ross Lake, in Northern Cascades National Park, Washington. . Photo Credit: NASA/Bill Ingalls . #sun #solareclipse #totalsolareclipse #partialsolareclipse #eclipse2017 #astronomy #heliophysics #moon #nasa #eclipse #solarsystem #science #research

For an entire year, NASA’s Solar Dynamics Observatory photographed the sun every 12 seconds. #SolarEclipse2017 . 🌕🌖🌗🌘🌑 . #space #sun #astronomy #nasa #natgeo #nationalgeographic #eclipse #solareclipse

It took 6 days and 3 helicopter trips to get this amazing shot from Life Below Zero. . Watch an all new episode tonight at 10/9c! . #Alaska #travel #natgeo #natgeochannel #nationalgeographic

We're just one month away from the end of Cassini's 20 year long mission of studying Saturn and its moons. . Watch our special, Mission Saturn, on September 15th to celebrate this spacecraft's journey! . #cassini #space #nasa #saturn

Did you know an adult lion’s roar can be heard up to 8km away?! . Watch @NatGeoWild’s Animal Fight Night on @NatGeoChannel all afternoon! . . #lion #lions #animals #africa #travel #natgeowild #natgeo #nationalgeographic

Here's a first look at our upcoming series #LongRoadHome premiering November 7 on @natgeochannel. #Repost @realmichaelkelly ・・・ ‪It was supposed to be a routine mission. Take a look at this new tease for my upcoming show #LongRoadHome premiering Nov 7 on @natgeochannel.

Let's celebrate the beginning of filming for Mars season 2 with some of our favorite #flashback photos from season 1! . . #mars #natgeochannel #natgeo #nationalgeographic #space

Clear your mind and be present as the Alaskan sun sets. . See more gorgeous Alaskan sites (including a supermoon!) on #LifeBelowZero Thursday at 10/9c! . #Alaska #alaskan #travel #travelphotography #sunset #natgeochannel #natgeo

This is what a full rotation of the moon looks like! Are you ready for the historic eclipse on August 21st?! . #nasa #moon #space #astronomy #natgeochannel #nationalgeographic #natgeo

Listen to this Alaskan ice! . #LifeBelowZero is new Thursdays at 10/9c. . #Alaska #nationalgeographic #natgeochannel #travel

See how one couple is #ChasingGenius by working to replace more asphalt with solar cells—and possibly linking the panels up with driverless cars. . Share your ideas with us today for a chance to win $25,000 toward making it a reality. http://www.natgeochasinggenius.com/ #chasinggenius

At 19, Kathy Ku had a simple idea that would change thousands of lives, not to mention her own. . Your idea could be a spark of genius! Share your ideas with us by July 31st for a chance to win $25,000 toward making it a reality. http://www.natgeochasinggenius.com/ #chasinggenius