Space

128 articles with this tag

How Scientists Recreate Star Explosions on Earth Science

How Scientists Recreate Star Explosions on Earth

Inside the world's most powerful rare-isotope accelerator, physicists smash atomic nuclei at half the speed of light to understand how stars forge the...

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How RTGs Power Spacecraft Billions of Miles From the Sun Science

How RTGs Power Spacecraft Billions of Miles From the Sun

Radioisotope thermoelectric generators convert the heat of decaying plutonium-238 into electricity, enabling spacecraft like Voyager 1 to operate for...

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Did Mars Have an Ocean? What the Evidence Shows Science

Did Mars Have an Ocean? What the Evidence Shows

Scientists have debated whether Mars once held a vast northern ocean for nearly four decades. New geological evidence, including a continental shelf '...

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How Gravitational Lensing Works—the Universe's Telescope Science

How Gravitational Lensing Works—the Universe's Telescope

Gravitational lensing bends light from distant objects around massive cosmic structures, acting as nature's own telescope. This guide explains the thr...

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How Reusable Rockets Work—and Why They Slashed Costs Technology

How Reusable Rockets Work—and Why They Slashed Costs

Reusable rockets land themselves after launch and fly again, cutting the cost of reaching orbit by up to 70 percent. Here is the engineering behind pr...

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How Lunar Oxygen Extraction Works—From Dust to Air Science

How Lunar Oxygen Extraction Works—From Dust to Air

The Moon's soil is roughly 45% oxygen by weight. Engineers are now developing reactors that melt lunar regolith and use electrolysis to split that oxy...

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How NASA's Artemis Program Works—Moon to Mars Science

How NASA's Artemis Program Works—Moon to Mars

NASA's Artemis program aims to return humans to the Moon and eventually reach Mars, using the powerful SLS rocket and Orion spacecraft. Here's how the...

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How Supermassive Black Holes Wake Up After Millions of Years Science

How Supermassive Black Holes Wake Up After Millions of Years

Most supermassive black holes sit quietly at the centers of galaxies, but some reignite after millions of years of dormancy, launching jets that stret...

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What Is the Hubble Tension—and Why Cosmology Is in Crisis Science

What Is the Hubble Tension—and Why Cosmology Is in Crisis

Two reliable methods for measuring the universe's expansion rate give stubbornly different answers, and the gap is now so large that physicists suspec...

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How Sungrazing Comets Work—and Why Most Don't Survive Science

How Sungrazing Comets Work—and Why Most Don't Survive

Sungrazing comets plunge within thousands of kilometers of the Sun's surface, enduring extreme heat and tidal forces. Most disintegrate, but their des...

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How Spacecraft Splashdown Recovery Works Science

How Spacecraft Splashdown Recovery Works

From parachute deployment to Navy diver extraction, here is how space agencies recover astronauts and capsules from the ocean — a method used since th...

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How Atoms Could Detect Gravitational Waves Science

How Atoms Could Detect Gravitational Waves

Scientists propose a radical new method to sense gravitational waves by tracking how they shift the light atoms emit, potentially shrinking detectors...

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