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Today in science: Pluto the dwarf planet

August 24, 2016 is the 10th anniversary of astronomers’ announcement of Pluto’s demotion to dwarf planet. The decision caused a shock wave around the world.

No double moon in 2016, or ever

I thought we might get through this summer without the dumb hoax about Mars as big as a full moon rearing its head. But, no.

Tallest peak in the US Arctic is …

No one was sure whether Mount Chamberlin or Mount Isto was the U.S. Arctic’s tallest mountain. Now an aerial study – and a ski mountaineer – declare the winner.

Today in science: Earth from the moon

First photo of Earth from the moon, released it in 1966. Later, NASA used modern digital technology to restore the photo, revealing more detail.

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Where’s the moon? Waning gibbous

Look for the waning gibbous moon to rise in the middle of the night. It might look strangely oblong.

NASA prepares to sample an asteroid

On September 8, NASA will launch its first sample return mission to an asteroid. A robot arm will reach out, snag some asteroid bits and return them to Earth.

Total eclipse of sun: August 21, 2017

One year from today … the 1st total solar eclipse visible from the contiguous U.S. since 1979. Start planning now!

Best places to watch 2017 eclipse

Where’s the best place to see the August 21, 2017 eclipse? Here are 10 great viewing spots to gaze upon nature’s grandest spectacle, weather permitting.

Mars and Saturn put on a show

Mars is about to move in between Saturn and the star Antares. Watch them form a line on our sky on August 23 and 24.

Dates of lunar and solar eclipses in 2016

The next eclipse is an annular solar eclipse on September 1, 2016.

How many eclipses in 1 calendar year?

Every calendar year has at least 4, but 5, 6 or even 7 eclipses are also possible. Why don’t we see them all?

Today in science: Gene Roddenberry

Happy 95th birthday to writer and producer Gene Roddenberry, creator of Star Trek.

Watch spacewalk live August 19

Two ISS astronauts will perform a spacewalk on Friday. NASA TV’s live coverage starts at 6:30 a.m. EDT (10:30 UTC) and lasts about eight hours.