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Celestron has upgraded the Pro models in its line of SkyMaster Porro binoculars with ED glass lenses and larger prisms. This review covers the 20x80mm model.

Telescopes and Equipment

Celestron’s SkyMaster binoculars reviewed

Human Spaceflight

Space weather forecasting needs an upgrade to protect future Artemis astronauts

The constellations Corona Borealis, Hercules, and more

Observing, Stars, Upcoming Events

How to see T Coronae Borealis, the ‘brightest nova of the generation’

The Sun rises at Stonehenge.

Observing, The Sun

Will the Sun always shine through Stonehenge on the solstice?

Only two of the station stones are still there. Credit: Drone Explorer/Shutterstock.

A Stonehenge mystery could be solved this June

Frost (colored blue) coats the top of Olympus Mons, the tallest volcano in our solar system. This image was shot by ESA’s Mars Express orbiter at 7:20 A.M. local martian time. The mountain’s right side is illuminated by the rising Sun in the east. Credit: ESA/DLR/FU Berlin.

Ephemeral morning frost discovered atop Mars’ tallest volcanoes

Collecting the OSIRIS-REx sample return capsule. Credit: NASA/Keegan Barber, CC BY.

Robotic Spaceflight, Science, Space Exploration

NASA’s asteroid Bennu sample return mission was a prime time to study an artificial meteor

Telescopes and Equipment

Explore the sky with Celestron’s autoguider

Merging black holes

When black holes merge, is the diameter of the new black hole bigger?

Human Spaceflight

William Anders, NASA Astronaut and US Air Force Major General, dies at 90

Human Spaceflight, Space Exploration

The People’s Spaceship: NASA, the Shuttle Program, and Public Engagement after Apollo

Exotic Objects, Science, Stars

A weird, repeating radio signal from space stumps astronomers