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ISS photobombs a lightning storm
See it scooting along the top of this image, taken last week by Susan Gies Jensen? She also made a video from her still images. See it here, and learn to spot the station.
July 24, 2017
How to watch Shark Week
This is a week of dueling shark-athons on television. A biologist advises viewers to take what they see with a large grain of sea salt.
July 24, 2017
Synchronized symphony of fireflies
This video shows a timelapse journey through Smoky Mountains National Park during world's largest gathering of synchronized fireflies. Beautiful!
July 24, 2017
Go young moon hunting at dusk
As twilight fades, search for the pale, whisker-thin waxing crescent moon near the sunset point on the horizon.
July 24, 2017
Hubble sees Phobos orbiting Mars
This image and video aren't artists' illustrations. They're from a real time-lapse sequence of images - acquired by the Hubble Space Telescope - of the tiny moon Phobos orbiting Mars. Cool!
July 22, 2017
Sun enters Cancer on July 20
You might know that the sun enters the sign of Cancer every year at the June solstice. It enters the constellation Cancer a month later, on or near July 20.
July 20, 2017
See it! Moon sweeps past Venus
People around the world watched this week as the waning crescent moon swept near the very bright planet Venus, and fainter star Aldebaran, in the east before dawn.
July 20, 2017
A shadow-band project for August 21
Shadow bands are elusive ripples of alternate light and dark, flitting over the ground or the sides of buildings during a total solar eclipse. How to take part in an International Shadow Band Campaign during the August 21 eclipse.
July 20, 2017
Maryam Mirzakhani, mathematician, dies at 40
She was an outstanding mathematician and first woman to receive the prestigious Fields Medal. Maryam Mirzakhani died on July 14 after a several-year battle with breast cancer.
July 20, 2017
Global methane levels hitting new highs
Here's why, after a 2000-era plateau, global levels of the greenhouse gas are hitting new highs.
July 19, 2017
