Here's a 2-minute video on the comet's October 19 near-miss of Mars, and how orbiting spacecraft will evade onslaught of dust particles from the comet.

Eleanor Imster

October 19, 2014

San Francisco Bay area overdue for a big quake

Four urban sections of the San Andreas Fault system in Northern California have stored enough energy to produce major earthquakes, according to a new study.

Eleanor Imster

October 15, 2014

Massive icebergs once drifted to Florida

New research suggests that during Earth's last ice age - about 21,000 years ago - icebergs regularly reached South Carolina and even southern Florida.

Eleanor Imster

October 14, 2014

4 a.m aurora

Aurora, mirrored in water, west of Saskatoon in Canada. Photo by Colin Chatfield.

Eleanor Imster

October 14, 2014

Largest-yet study describes near-death experiences

Tunnels ending in light, your life flashing before you, out-of-body sensations. Near-death experiences merit further study without prejudice, these researchers say.

Eleanor Imster

October 13, 2014

Active moon volcanos in geologically recent times

Last volcanic activity on moon thought to be a billion years ago. Now small lava flows on moon’s dark plains suggest activity as recently as 50 million years ago.

Eleanor Imster

October 12, 2014

This small hot spot produces largest U.S. methane concentration

Satellite data show that one small “hot spot” in the U.S. Southwest produces the largest concentration of the greenhouse gas methane seen over the United States.

Eleanor Imster

October 9, 2014

Eleanor Imster

Eleanor Imster has helped write and edit EarthSky since 1995. She was an integral part of the award-winning EarthSky radio series almost since it began until it ended in 2013. She and her husband live in Tennessee, where they enjoy guitar playing and singing. They have 2 grown sons.