The International Space Station underwent an unscheduled reboost in orbit yesterday, to avoid a collision with an unknown piece of space junk. The 3-man crew was ordered to shelter, but is safe.

On September 23, 24, 25 and 26, 2020, the moon can guide your eye to the solar system's 2 biggest gas giant planets, Jupiter and Saturn.

On September 15, 2020, Arctic sea ice reached its annual minimum extent, the 2nd-lowest on record. The Arctic region in general is warming 3 times faster than the rest of the planet.

Guy Ottewell's insights on today's autumnal equinox.

In Chinese thought, autumn is with the direction west, considered to be the direction of dreams and visions.

At an equinox, and for several days before and after, the midday sun is straight up at noon seen from Earth's equator. At this equinox, the sun is crossing the celestial equator, moving from north to south.

Data from ESA's Copernicus Sentinel-2 satellite help climbers negotiate a treacherous glacier on the route to Mt. Everest's summit.

A beautiful new image of Jupiter from the Hubble Space Telescope - captured in August 2020 - shows the planet's icy moon Europa as well as several famous storms in Jupiter's atmosphere.

After sunset these next several days - September 18, 19, 20 and 21, 2020 - watch for the waxing crescent moon's return to the evening sky.

For the first time, astronomers have detected a planet orbiting a white dwarf star. If further confirmed, the discovery shows that some planets could survive the destruction of their sun-like stars, and some might even remain potentially habitable.