Human World
Avi Loeb and ‘Oumuamua. Why the controversy?
Astronomer Jason Wright, of the blog AstroWright, explains why the recent work of Avi Loeb is seen as outrageous by some.
Brightest Stars
Fomalhaut is the loneliest star in the southern sky
Fomalhaut is known as the “lonely one” or the "solitary one" because it shines brightly in a patch of sky with no other bright stars. In 2023, Saturn is nearby.

Europa’s carbon dioxide likely came from its ocean

Two new studies suggest that Europa's carbon dioxide deposits originate in the moon's subsurface ocean. The results support a habitable ocean environment.

Sun activity: Meet sunspot region AR3445 (again)

Sun activity for September 24 is moderate, with 4 M flares, including a M4.4 flare from AR3445. This large flare might have a CME associated with it.
Astronomy Essentials

Visible planets and night sky for September

The bright moon will pass in front of the constellation Capricornus the Sea-goat on September 24 and 25. Capricornus looks like an arrowhead. Visible planets, here.
Human World

Pablo Neruda, a poet who embraced cosmic beauty

Pablo Neruda was a famous Chilean poet who wrote: "Every day you play with the light of the universe." Neruda died on this date, September 23, in 1973.
Astronomy Essentials

2023 September equinox: All you need to know

The September equinox is here! Autumn for the Northern Hemisphere. Spring for the Southern Hemisphere. Here's all you need to know.

Extreme rainfall and flooding as Earth warms

Global warming puts more water vapor in Earth's atmosphere. The water vapor will fall out of storms in extreme rainfall and flooding.

Solstices and equinoxes in a video from space

See how sunlight falls on Earth's surface during the solstices and equinoxes, and get a better understanding of why Earth's tilt causes the seasons.

Why does Earth have 4 seasons every year?

Some assume our planet's changing distance from the sun causes the four seasons. But it's actually the tilt of the Earth's axis.