Paul Scott Anderson

How many ETs are in our galaxy? Ask the Alien Civilization Calculator

Researchers at Omni Calculator have created the Alien Civilization Calculator, a unique combination of two different methods of trying to determine how many advanced alien civilizations may exist in our galaxy.

Colorful bursts in night sky with text annotations.

How do fireworks get their colors?

Many, perhaps most, fireworks displays have been canceled in 2020 due to the pandemic. Still, it’s fun to contemplate the fact that the beautiful colors in fireworks – so good at stirring our emotions – are created by chemistry.

Saturn-like planet with smaller bluish moon.

Astronomers discover 6 possible new exomoons

Astronomers from Western University in Canada have discovered six more possible exomoons orbiting distant exoplanets, in data from the Kepler Space Telescope.

Two planets orbiting a red star with other stars in background.

At least 2 super-Earths orbit this red dwarf star

Astronomers from the University of Göttingen in Germany have discovered two, and possibly three, super-Earth exoplanets orbiting the nearby red dwarf star Gliese-887.

Three multi-colored globes with tiny arrows on black background.

How dust could make some exoplanets more habitable

A new study from scientists in the UK suggests that atmospheric dust could increase the habitability of some exoplanets, especially those orbiting red dwarf stars.

Matchstick-like trees laying on the ground, in black and white.

When the sky exploded: Remembering Tunguska

On June 30, 1908, the largest asteroid impact in recorded history occurred in remote Siberia, Russia. We now celebrate Asteroid Day each year on the anniversary the Tunguska event, as it is now known.

Light-colored terrain with many brown cracks and streaks.

More evidence that Europa’s ocean is habitable

A new study shown by NASA scientists at the Goldschmidt conference this week provides further evidence that Europa’s ocean is habitable and similar to Earth’s oceans.

A dish type radio telescope, at night, with a jagged line of signal from the stars reaching it.

New Exotica Catalog will help guide search for ET

“What if extraterrestrial intelligences are not like us, but are found in the frigid reaches of the outer solar system, the extreme gravity of neutron stars, the brilliant cores of active galaxies, or the hearts of the richest galaxy clusters?”

Large sphere with dark curved lines, a long thin straight line and smaller darker sphere in front of it, on black background.

Saturn’s large moon Titan is drifting away 100 times faster than anyone knew

Saturn’s largest moon Titan is drifting away from the planet 100 times faster than previously thought, according to a new study from researchers in the U.S., France and Italy.

Woman with headphones in cockpit.

Sally Ride: 1st American woman in space

Ride was the 1st American woman to go to space, flying on the STS-7 space shuttle Challenger mission in 1983, and later on another mission in 1984.