Astronomy

98 articles with this tag

How Space Radiation Works—and Why It Threatens Astronauts Science

How Space Radiation Works—and Why It Threatens Astronauts

Beyond Earth's magnetic shield, astronauts face three invisible hazards: trapped particles in the Van Allen belts, unpredictable solar storms, and a r...

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Why the Moon's Far Side Looks Nothing Like the Near Side Science

Why the Moon's Far Side Looks Nothing Like the Near Side

The Moon's hidden hemisphere is rugged, crater-scarred, and almost devoid of the dark plains visible from Earth. The explanation traces back to the Mo...

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What Are 'Forbidden' Planets and Why They Exist Science

What Are 'Forbidden' Planets and Why They Exist

Gas giant exoplanets orbiting tiny red dwarf stars defy the leading models of planet formation. Here is how these so-called forbidden planets challeng...

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Artemis II Crew Shatters Apollo 13 Distance Record Science

Artemis II Crew Shatters Apollo 13 Distance Record

NASA's Artemis II crew aboard the Orion spacecraft reached a record 252,756 miles from Earth on April 6, surpassing Apollo 13's 56-year-old record by...

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How the Rubin Observatory Will Map the Entire Sky Science

How the Rubin Observatory Will Map the Entire Sky

The Vera C. Rubin Observatory in Chile uses the world's largest digital camera to photograph the entire visible sky every three nights, hunting astero...

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How NASA's SLS Mega-Rocket Works—and Why It Matters Science

How NASA's SLS Mega-Rocket Works—and Why It Matters

NASA's Space Launch System is the most powerful rocket ever built for crewed spaceflight, designed to send astronauts beyond low Earth orbit for the f...

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How Free-Return Trajectories Work—and Why They Save Lives Science

How Free-Return Trajectories Work—and Why They Save Lives

A free-return trajectory uses the Moon's gravity to slingshot a spacecraft back to Earth without engine burns, serving as the ultimate safety net for...

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How Gamma-Ray Bursts Work—the Universe's Biggest Blasts Science

How Gamma-Ray Bursts Work—the Universe's Biggest Blasts

Gamma-ray bursts are the most powerful explosions in the known universe, releasing more energy in seconds than the Sun emits in its entire lifetime. H...

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How Atmospheric Reentry Works—and Why Speed Kills Science

How Atmospheric Reentry Works—and Why Speed Kills

Returning from space means slamming into a wall of air at thousands of kilometers per hour. The physics of atmospheric reentry—from blunt-body aerodyn...

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How Solar Flares Work—and Why They Threaten Earth Science

How Solar Flares Work—and Why They Threaten Earth

Solar flares are sudden eruptions of magnetic energy on the Sun that can disable satellites, knock out power grids, and disrupt GPS. Here's how they f...

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What Are Quasars and How Do They Shape Galaxies? Science

What Are Quasars and How Do They Shape Galaxies?

Quasars are the brightest objects in the universe, powered by supermassive black holes devouring matter at galactic cores. New research shows their ra...

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Artemis II: NASA's First Crewed Moon Mission in 53 Years Science

Artemis II: NASA's First Crewed Moon Mission in 53 Years

NASA is counting down to the April 1 launch of Artemis II, sending four astronauts around the Moon aboard the Orion spacecraft — the first crewed luna...

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