The summer solstice marks the official start of summer. It brings the longest day and shortest night of the year for the 88 percent of Earth's people who live in the Northern Hemisphere.
SPACE.com invites experts in space exploration, science & technology to provide insightful commentary and informed perspective on news, current events, innovations, big ideas and ongoing research. Expert Voices includes Op-Ed analysis and opinion as well as interesting observations from the field and space exploration efforts around the world.
Albert Einstein's theory of general relativity is a monumental achievement of human ingenuity, creativity and perseverance — to say the least.
Mysterious creatures called magnetic monopoles are predicted by our theories of the universe — so why has nobody seen them?
Bridenstine has also backed up his rhetoric with vocal support for NASA's climate missions, which have been threatened under a Trump presidency.
There are only a handful of astronauts, but every year thousands of high school and college students get to visit space vicariously, by launching their own satellites.
Earlier this year, astronomers stumbled upon a fascinating finding: Thousands of black holes likely exist near the center of our galaxy.
The lives we save from an app apply directly to the lifeblood of the space program. The two are inseparable, as they should be, because what happens in space leads to advances here on Earth.
Deep in the sun's core, buried under hundreds of thousands of miles of twisting and convecting hydrogen and helium, a nuclear fire rages.
When we look up at Mars in the night sky we see a red planet - largely due to its rusty surface. But what's on the inside?
The rigors of astronaut training determine who has the "right stuff." What some may not know, however, is that every astronaut undergoes life support training.
Jacqueline Hewitt discusses how NASA's TESS exoplanet mission has already changed the institute she directs and will bring about further evolution in the years to come.
At 13.8 billion years ago, our entire observable universe was the size of a peach and had a temperature of over a trillion degrees.
The just-launched Transiting Exoplanet Survey Satellite (TESS) could soon provide the breakthrough identification of dozens of potentially habitable exoplanets right in our cosmic backyard.
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