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NASA's James Webb Space Telescope has characterized the atmosphere of TOI-199b, a Saturn-sized world 330 light-years away—the first temperate giant exoplanet studied in detail.

On Feb. 24, a JPL-led team ran a lithium-vapor magnetoplasmadynamic thruster at 120 kilowatts inside the CoMeT vacuum chamber, more than 25 times the power of the electric engines on NASA's Psyche spacecraft.

Psyche will pass 4,500 kilometers above Mars on May 15 at 12,333 mph, harnessing the planet's gravity to redirect itself toward the metal-rich asteroid Psyche and calibrate its imager, magnetometer, and gamma-ray spectrometer.

NASA powered down Voyager 1's LECP instrument on April 17, 2026 to extend the interstellar probe's life by about a year while engineers prepare a more ambitious power-saving overhaul.