Lunar Occultation of Mars
The Lunar occultation came as the Moon was near apogee, about 400,000 kilometers away. Mars was almost 180 times more distant.
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Unexpected Black Holes Collide
The two black holes that spiraled together to produce the gravitational wave event GW190521 were the most massive black holes ever seen by LIGO and VIRGO so
The Halo of Andromeda Galaxy
This is the Halo of Andromeda Galaxy (M31), the closest large spiral galaxy to our Milky Way.
Stunning remnant of Stellar Blast
This stunning image depicts a small section of the Cygnus supernova blast wave, while appearing as a delicate and light veil draped across the sky,
Light and Dark in Martian Chiaroscuro
Deep shadows create dramatic contrasts between light and dark in this high-resolution close-up of the Martian surface.
Fermi Spirograph and Women’s Equality Day
What does this Fermi Gamma-ray Space Telescope Spirograph have in common with Women’s Equality Day?
Space Laser Communications closer to reality
New ground station brings space laser communications closer to reality.
A Guide to Near-light-speed Travel
So, you’ve just put the finishing touches on upgrades to your spaceship, and now it can fly at almost the speed of light…
Growing Anomaly in Earth’s Magnetic Field
A small but evolving dent in Earth’s magnetic field can cause big headaches for satellites.
Hurricane Genevieve from Space Station
The crew aboard the International Space Station spotted Hurricane Genevieve off Mexico’s Pacific coast on Aug. 19, 2020.