Jesse Emspak, Space.com

Read the latest articles by Jesse Emspak, Space.com at Seeker

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Planets

Space & Innovation

After orbiting Saturn for more than 13 years, NASA's Cassini spacecraft is getting ready to say goodbye.

Cassini Enters Final Phase of Its 13-Year-Long Orbit of Saturn

Astronomy

A giant star near the center of our galaxy hints, once again, that Albert Einstein was correct about gravity.

Giant Star, Massive Black Hole Give Einstein’s Relativity Theory an Extreme Test

Astronomers are seeing what Earth's own galaxy looked like in its youth by scanning the skies for some of the oldest objects in the universe.

Time-Travel Gaze Reveals the Shape of Ancient Galaxies

Exploration

On the dwarf planet Ceres, volcanoes rage - but instead of hot lava coming out of them as on Earth, they spew brine and ice.

Volcanoes on Dwarf Planet Ceres Are Spewing Briny Ice

The dark streaks are called recurring slope lineae (RSL), and last year, scientists presented new evidence suggesting that these streaks contain liquid water - albeit very, very salty water called brine.

Dark Streaks on Mars Hold Water, But Not Much

Very few people get to fly to low Earth orbit, let alone live there.

Latest Posts From Jesse

Cassini Enters Final Phase of Its 13-Year-Long Orbit of Saturn

On Monday the probe made the first of five passes through Saturn’s upper atmosphere, initiating the last phase of its “grand finale.”

Giant Star, Massive Black Hole Give Einstein’s Relativity Theory an Extreme Test

The star S2 showed slight deviations in its orbit of a black hole at the center of the galaxy, showing Einstein’s theory holds even within gravity fields containing the mass of 4 million suns.

Time-Travel Gaze Reveals the Shape of Ancient Galaxies

Looking deep into the universe also means looking back in time, and these "young" Milky Way-like galaxies are about 12 billion light-years away from Earth.

Volcanoes on Dwarf Planet Ceres Are Spewing Briny Ice

New evidence for the dwarf planet's icy volcanism, called cryovolcanism, came from NASA's Dawn space probe, which orbits Ceres.

Dark Streaks on Mars Hold Water, But Not Much

Dark streaks identified in dozens of locations on the surface of Mars appear to hold water, but not very much, according to an analysis of data from NASA's Mars Odyssey mission.

3-D Video Tours Space Station, Inside and Out

Put on your 3-D glasses, this narrated video takes viewers on an end-to-end journey through the International Space Station.