On Monday, scientists announced the first-ever observation of a cosmic event using both gravitational wave detectors and conventional telescopes. They witnessed a kilonova, a violent, brilliant explosion that occurs when two neutron stars collide. The discovery was a massive undertaking. Thousands o...

When Falcon Heavy lifted off, it would have been the most powerful operational rocket in the world by a factor of two. With the ability to lift into orbit nearly 64 metric tons (141,000 lb)---a mass greater than a 737 jetliner loaded with passengers, crew, luggage and fuel--Falcon Heavy can lift mor...

This artist's concept animation depicts key events of NASA's Mars Science Laboratory mission, which launched November 26, 2011 and it is schedule to land in Mars on August 6, 2012.

Landing the Curiosity rover on Mars is the most difficult and nail-biting part of the whole mission. See just how hard it is to land on Mars in this 60-second video.

With concerns growing over the Delta variant of Covid-19, here's what you need to know about whether you need to start wearing a facemask in public again. MSNBC's Brian Williams talks with Dr. Nahid Bhadelia.

New video recorded during NASA’s Orion return through Earth’s atmosphere provides viewers a taste of what the vehicle endured as it returned through Earth’satmosphere during its Dec. 5, 2014 flight test. The video begins 10 minutes before Orion's 11:29 a.m. EST splashdown in the Pacific Ocean, just

A mysterious and intense X-ray source near the black hole shines onto the surface layers of the accretion disk, causing iron atoms to radiate characteristic emission -- what astronomers call the iron K line -- at about 6,000 to 7,000 electron volts. The inner part of the disk is orbiting the black h...

SpaceX's Inspiration4, the first all-civilian spaceflight in history splashes down in the Atlantic Ocean after completing a three-day orbital flight around the Earth.

A star nursery 1,350 light years away toward the equatorial constellation of Orion has been captured for the first time by NASA. The Orion Nebula is a region that is similar to the region where the Solar System originated 4.5 billion years ago. Since the Orion nebula's newborn stars are being forme...

50 years ago, NASA’s Apollo 11 mission changed our world and ideas of what is possible by successfully landing humans on the surface of the moon⁠—and bringing them home safely⁠—for the first time in history. Today’s video Doodle celebrates this moment of human achievement by taking us through the jo