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planetary science

Jason Morgan developed the theory of plate tectonics in 1967 while working among a critical mass of talented geophysicists at Princeton University.
Thinking Places

Jason Morgan Recalls Discovering Earth’s Tectonic Plates

Jason Morgan developed the theory of plate tectonics in 1967 while working among a critical mass of talented geophysicists at Princeton University.

Even in the age of sun-observing satellites, astronomers like Jay Pasachoff still seek out total solar eclipses for the tales they can tell about our sun.
Q&A

Eclipse Hunter Reveals the Science That Can Only Be Done in the Dark

Even in the age of sun-observing satellites, astronomers like Jay Pasachoff still seek out total solar eclipses for the tales they can tell about our sun.

Textbooks say that the moon was formed after a Mars-size mass smashed the young Earth. But new evidence has cast doubt on that story, leaving researchers to dream up new ways to get a giant rock into orbit.
planetary science

What Made the Moon? New Ideas Try to Rescue a Troubled Theory

Textbooks say that the moon was formed after a Mars-size mass smashed the young Earth. But new evidence has cast doubt on that story, leaving researchers to dream up new ways to get a giant rock into orbit.

Breathless media coverage notwithstanding, the cases for and against a hypothetical Planet Nine in the outskirts of the solar system remain inconclusive.
Abstractions blog

Planet Nine Is Put on Trial in Absentia

Breathless media coverage notwithstanding, the cases for and against a hypothetical Planet Nine in the outskirts of the solar system remain inconclusive.

Join David Kaplan on a virtual-reality tour showing how the sun, the Earth and the other planets came to be.
Multimedia

Journey to the Birth of the Solar System

Join David Kaplan on a virtual-reality tour showing how the sun, the Earth and the other planets came to be.

Geochemical signals from deep inside Earth are beginning to shed light on the planet’s first 50 million years, a formative period long viewed as inaccessible to science.
geophysics

Explorers Find Passage to Earth’s Dark Age

Geochemical signals from deep inside Earth are beginning to shed light on the planet’s first 50 million years, a formative period long viewed as inaccessible to science.

Searching for signs of life on faraway planets, astrobiologists must decide which telltale biosignature gases to target.
astrobiology

Scientists Debate Signatures of Alien Life

Searching for signs of life on faraway planets, astrobiologists must decide which telltale biosignature gases to target.