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The extremely hot heart of quasar 3C273
Scientists combined telescopes on Earth and in space to learn that this famous quasar has a core temperature hotter than 10 trillion degrees! That's much hotter than formerly thought possible.
March 30, 2016
Oddball hot Jupiter has wildly eccentric orbit
Researchers have studied how the exoplanet’s temperature changes as it approaches, sweeps by, and moves away from its star.
March 29, 2016
Could our sun emit killer superflare?
Solar eruptions from our sun are nothing compared to eruptions from some other stars - so-called 'superflares'. Two scientists say our sun could also be a superflare star.
March 27, 2016
Closest comet in 246 years via radar
Record-breakingly close flybys of two comets earlier this week. Radar images of one, the closest comet in 246 years. Will the other be visible to the eye?
March 26, 2016
Solar storms ignite Jupiter’s auroras
For the first time, Jupiter’s auroras have been studied in X-ray light when a giant solar storm arrived at the planet.
March 24, 2016
Moon’s tilt has changed over time
Did the 'man in the moon' look different from ancient Earth? Yes, according to new research showing that the moon has undergone what's called True Polar Wander.
March 24, 2016
Kepler catches a supernova shockwave
The planet-hunting Kepler spacecraft caught the earliest minutes of 2 exploding stars and, for the first time, the flash of supernova shockwave in visible light.
March 23, 2016
Dramatic circular outburst from sun
Video of a circular solar outburst observed last week by NASA's Solar Dynamics Observatory.
March 22, 2016
Best view yet inside Mars
Scientists have used fluctuations in the orbits of 3 spacecraft to map Mars' gravity. Thanks to this gravity map, it now seems likely that Mars has a molten core.
March 21, 2016
Getting to know Pluto
After last summer's Pluto flyby, the New Horizons spacecraft started sending data to Earth – at 2 kilobits per second. What scientists have learned so far from that rich, slow cache.
March 21, 2016
