Planetary Geography

On October 4, 2021 at 1:40 p.m. Western European Time, an astronaut aboard the International Space Station captured this image of the south end of La Palma showing ash plumes rising from the volcano.

Cumbre Vieja Volcano on La Palma Island

Julian Marks

Cumbre Vieja, a volcano on the island of La Palma, erupted again on September 19, 2021.

The magnetosphere, or magnetic field encircling Earth, is seen in this image.

True North, Magnetic North, and Grid North

Caitlin Dempsey

There are a few definitions of north.

The magnetosphere, or magnetic field encircling Earth, is seen in this image.

The Adams Event – Did Polar Drift Cause Climate Change 42,000 Years Ago?

Katarina Samurović

Some 42,000 years ago, Earth went through several centuries of dramatic climate change and environmental chaos.

October 2020 will see two full moons. Image: NASA, public domain.

Blue Moon on Halloween 2020

Caitlin Dempsey

For the first time since 2001, October will have two full moons.

Source: NASA, https://heasarc.gsfc.nasa.gov/docs/rosat/gallery/display/saa.html

South Atlantic Anomaly: A Growing Dent in the Earth’s Magnetic Field

Caitlin Dempsey

NASA is tracking a dent in the Earth's magnetic field.

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