Smallest Martian phase on September 13

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Did you know Mars shows phases as seen from Earth? As darkness falls tonight, the waxing gibbous moon simulates Mars' smallest phase of 2016.

Bruce McClure

September 13, 2016

Impossibly bright monster pulsars

Astronomers in Japan used a supercomputer and a hypothetical neutron star to explain blinking, enigmatic objects known as Ultra Luminous X-ray pulsars.

Deborah Byrd

September 12, 2016

Crazy airglow

Airglow over Acadia National Park earlier this month, as a tropical storm raged in the Atlantic. Can a storm cause airglow? An expert comments.

Deborah Byrd

September 11, 2016

Glorious new images show Titan’s dunes

Cassini spacecraft will begin its grand finale at Saturn in 2017. This was one of Cassini's last close flybys of Saturn's large moon, Titan.

Deborah Byrd

September 11, 2016

Climate change’s role in Louisiana floods

After a rapid assessment, scientists have concluded that climate change increased chances of the August record rains in Louisiana by at least 40%.

Eleanor Imster

September 10, 2016

Minor lunar standstill and Harvest Moon

A phenomenon known as a "minor lunar standstill" will cause a shift in characteristic moonrise times on the nights around this year's Harvest Moon.

Bruce McClure

September 10, 2016

See the horse in this lightning?

Pareidolia is seeing familiar objects or patterns in otherwise random or unrelated objects or patterns ... like seeing a horse in lightning.

Eleanor Imster

Deborah Byrd

September 10, 2016

This is Europe’s oldest living tree

The scientists who discovered it in the highlands of northern Greece named it Adonis, for the Greek god of beauty and desire. It's more than 1,000 years old.

Eleanor Imster

September 9, 2016