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Slice of History: Transition Pipe

Slice of History: Transition Pipe

By Julie Cooper Each month in “Slice of History” we’ll be featuring a historical photo from the JPL Archives. See more historical photos and explore the JPL Archives at https://beacon.jpl.nasa.gov/. Transition Pipe — Photograph Number 327-287A This test setup was part of an investigation in 1954 of the stability of laminar pipe flow with respect [...]

Extreme Worlds: The Moon’s Inner Core Revealed

Extreme Worlds: The Moon’s Inner Core Revealed

By Todd Ratcliff The Apollo 15 (left) and Apollo 11 (right) lunar laser ranging retroreflector arrays. Image credit: NASA/D. Scott Everyone knows that Earth’s Moon is a cold, dead chunk of rock, right? Hold on there, Sparky, not so fast! While it’s true that it was once thought that the moon was an inert, lifeless [...]

Slice of History: Cesium-Lithium Test System

Slice of History: Cesium-Lithium Test System

By Julie Cooper Each month in “Slice of History” we’ll be featuring a historical photo from the JPL Archives. See more historical photos and explore the JPL Archives at https://beacon.jpl.nasa.gov/. Cesium-Lithium Test System — Photograph Number 383-5651Ac As early as 1961, JPL’s Propulsion Division was working on a new type of power system for future [...]

Out of This World? The Mars Climate Change Mystery

Out of This World? The Mars Climate Change Mystery

By Erik Conway, writing for My Big Fat Planet Mars has been a grand scientific mystery ever since the first modern images were beamed back from the Mariner 4 spacecraft in 1965. Those snapshots showed a moon-like, cratered surface — not what we expected. Scientists had assumed that Mars would have an Earth-like atmosphere, composed [...]

Rocks and Stars with Amy: This Year I Saw the Universe

Rocks and Stars with Amy: This Year I Saw the Universe

By Amy Mainzer With WISE, I roamed the skies — seeing everything from the closest asteroids to the most distant galaxies. When I was a kid, maybe 6 or 7, I remember reading the encyclopedia about Andromeda, Mars and Jupiter. After that, I spent a lot of my free time (and a fair amount of [...]

Science Fact, Not Fiction: Isaac Asimov on the Greenhouse Effect

Science Fact, Not Fiction: Isaac Asimov on the Greenhouse Effect

By Amber Jenkins I stumbled upon this video earlier today. It’s Isaac Asimov, famous science fiction writer and biochemist, talking about global warming — back in January 1989. If you change the coloring of the video, the facial hair style, and switch out Asimov for someone else, the video could pretty much have been made [...]

Red, Red Moon and Other Lunar Eclipse Phenomena

Red, Red Moon and Other Lunar Eclipse Phenomena

By Dr. David Diner Tiny airborne particles, or aerosols, can affect the appearance of the moon during a total lunar eclipse, sometimes giving it a reddish hue. Image credit: NASA/JPL-Caltech A lunar eclipse occurs when the Earth is positioned between the sun and the moon. Although the Moon passes through the Earth’s shadow, the lunar [...]

Lunar Eclipse, the Moon’s Interior, and the Holy GRAIL

Lunar Eclipse, the Moon’s Interior, and the Holy GRAIL

By Sami Asmar In addition to the awesome views they offer, lunar eclipses have always provided scientific clues about the moon’s shape, location and even surface composition. Although there will continue to be opportunities for observers to examine and reflect on fundamental concepts about the moon, such as its origin and interior structure, more modern [...]

Unchained Goddess: Frank Capra Knew

Unchained Goddess: Frank Capra Knew

By Amber Jenkins You might think from the amount of “climate science debate” that is given airtime in the U.S. media that it’s undiscovered territory. But it’s not. The science is very well established and goes back a long way. Global warming is not a new concept. The Victorians knew about it. John Tyndall (born [...]

Rocks and Stars with Amy: This Asteroid Inspected by #32

Rocks and Stars with Amy: This Asteroid Inspected by #32

By Amy Mainzer Over the course of the nine months we’ve been operating WISE, we’ve observed over 150,000 asteroids and comets of all different types. We had to pick all of these moving objects out of the hundreds of millions of sources observed all over the sky — so you can imagine that sifting through [...]

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