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New Horizon

Astronomy in Space with David Dickinson

New Horizons Recruits Amateurs to Sight Stars

The New Horizons team wants you to help measure the distance to two stars, yielding the longest-ever baseline measurement of a key cosmic yardstick.

Celestial News & Events

March 2020: A Planet Trio and More!

During March, the cosmos offers a lot to see both before sunrise and after sunset. To get a guided tour of the month's highlights, play or download this month's Sky Tour episode.

Then and now

Explore the Night with Bob King

The Fall and Rise of Betelgeuse

With its recent uptick in brightness, Betelgeuse appears to be slowly returning to normal. But will it? Astronomers urge us to keep watch.

Betelgeuse telescopic view

Explore the Night with Bob King

Is Betelgeuse Approaching a Crossroads?

Astronomers all over are waiting with bated breath to see what Betelgeuse will do next. Is it going to start brightening again on February 21st? Or will it continue to surprise?

Celestial News & Events

Do You Love the Stars? Do Some Astronomy This Valentine's Day

Whether you're celebrating Valentine's Day or boycotting it, anyone visiting this site loves the stars. Here's a chance to participate in an effort to make sure future generations love them too.

Mars at the moon's edge

Celestial News & Events

Watch the Moon Occult Mars Before Sunrise on February 18th

Occultations of stars by the Moon occur routinely, but planetary lunar occultations are much rarer birds. That's why I hope you'll make the effort Tuesday morning February 18th to watch the waning crescent Moon occult the planet Mars.

Moon and 3 planets Feb 18-20 480p

Sky Tour Astronomy Podcast - Discover the Night Sky

February 2020: Five Planets & More!

If you drag yourself outside before dawn and then wait until after sunset, you can spot all five of the naked-eye planets. And the Winter Hexagon glides high in the evening sky.

A bright supernova

Variable Stars

The Latest on Betelgeuse, Plus a Bright Supernova and New Comet Iwamoto

The sky provides. This winter, the fading of Betelgeuse caught us all by surprise. Now, as January wraps up, we can add a new comet discovery and a supernova bright enough to see in a 6-inch telescope to an ever-growing list of seasonal sky wonders.

Thuban in TESS image

Celestial Objects to Observe

See Ancient “North Stars" Eclipse Each Other

The ancient pole star known as Thuban turns out to be an eclipsing binary. If you're up for a challenge, you can see the eclipses for yourself.

Comet PanSTARRS blooms

Explore the Night with Bob King

Comets to Catch in 2020

Here's the lowdown on which comets will brighten our skies in 2020.

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