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Harvest Moon in 2023

Sky Tour Astronomy Podcast

October Podcast: Jupiter & Saturn Dance at Dusk

This month’s big celestial news might be the annular solar eclipse that will be seen in the Americas, but everyone can share the fun of casual stargazing by streaming or downloading October’s Sky Tour astronomy podcast.

Moon with Jupiter and the Pleiades, Oct 1 and 2, 2023

Celestial News & Events

This Week's Sky at a Glance, September 29 – October 8

The Moon pairs with Jupiter, then the Pleiades, as it departs the evening sky. That leaves a dark-sky Milky Way crossing the zenith, where Cygnus the Milky Way Swan flies southward for fall.

Artist's concept shows blue-streaked surface of a massive solid planet


How Did Two Hot and Super-dense Neptunes Form?

Astronomers have discovered two Neptune-size planets that are denser than rock and in searingly close orbits to their star. How did these odd worlds form?

group of people standing beneath huge telescope

People, Places, and Events

Travel Diary: Astronomical Adventures in the Canaries

The week of September’s new Moon, a passel of astro-enthused passengers explored one of the world’s premier observing locations.

Solar System

Psyche Asteroid Mission Set for Launch October 5th

NASA’s newest mission is bound for the metallic asteroid of the same name. The metal-rich rock offers us a view of asteroid interiors.

A mostly empty field with a few telescopes on it below a pink building and the Porter Turret telescope

People, Places, and Events

Stellafane Star Party Celebrates Their Centennial

As hundreds of astronomers made their annual pilgrimage to the “shrine to the stars” this year, the Springfield Telescope Makers were preparing to celebrate Stellafane's 100th anniversary.

Bennu sample return capsule on the ground in the desert, red-white parachute behind

Spacecraft and Space Missions

Osiris-REX Capsule Returns Samples of Asteroid Bennu to Earth

Samples taken from the asteroid Bennu are now safely on Earth.

Illustration of an exoplanet planet and its red cool dwarf star on a black background that is speckled with some small stars. The planet is large, in the foreground on the right and the star is smaller, in the background at the lower left. The planet is various shades of blue, with wisps of white scattered throughout. The left edge of the planet (the side facing the star) is lit, while the rest is in shadow. The star has a bright red glow


Hubble, Webb Data Hint at Ocean Worlds

Data coming from the Webb and Hubble space telescopes suggests two exoplanets might be water worlds. But the evidence isn’t yet definitive.

Moon passing under Saturn in evening, Sept. 26-28, 2023

Celestial News & Events

This Week's Sky at a Glance, September 22 – October 1

The bright Moon steps eastwaed night by night under Altair, then Saturn, then the Great Square of Pegasus. Meanwhile, Deneb replaces Vega as the zenith star; welcome to fall.

Flattened Sun

Explore the Night with Bob King

Is the Day 12 Hours Long on the Equinox? It's Complicated

The Earth's atmosphere and the large size of the solar disk result in unequal days and nights, even on the equinox.

Baily's beads


To Catch Beads of Sunlight, Here's Where You Should Head for October 14th's Annular Eclipse

Some eclipse-chasers will choose to view a “broken ring” and a long display of Baily's beads on October 14, 2023.

People, Places, and Events

See the Winning Images of Royal Observatory Greenwich's Astrophotographer of the Year Contest

See the images that won the Royal Observatory Greenwich's Astronomy Photographer of the Year award.

NASA meatball logo

Astronomy and Society

NASA Finds No Evidence UFOs Are Extraterrestrial, Promises Further Study

An independent study shows how NASA can help understand unidentified anomalous phenomena, more colloquially known as UFOs.

Venus, Regulus, and Mercury in early dawn, Sept 16, 2023

Celestial News & Events

This Week's Sky at a Glance, September 15 – 24

Comet Nishimura shines at its brightest... but don't be disappointed, we warned you. Meanwhile Jupiter outdoes Saturn as an evening light, and the Little Dipper dumps water into the Big Dipper.

Artist's concept of giant structures made of galaxies


Galaxies Outline Bubble 1 Billion Light-Years Wide in Space

A newfound cosmic alignment of galaxies challenges fundamental ideas about the nature of our universe.

Diagram showing lensing of quasar light by foreground galaxy and intergalactic dark matter


Dark Matter Clumps Float Between Galaxies, Data Shows

Astronomers have found clumps of dark matter 30,000 light-years wide in the space between galaxies in the distant universe.

central pulsar encased in disk, pulsar emits narrow jet out of its poles. In background is a larger but less massive companion star

Stellar Science

Peculiar Pulsar Throws “Cosmic Cannonballs”

Astronomers think a city-size star that’s spinning faster than a kitchen blender is shooting out plasma torpedoes.

Waning crescent Moon passing Venus at dawn, Sept 11-12, 2023Moon

This Week's Sky At a Glance

This Week's Sky at a Glance, September 8 – 17

Comet Nishimura teases us shyly low on the dawn horizon, then low on the dusk horizon. The Milky Way arches high across the evening sky, and Saturn invites your telescope.


Astronomy in Space with David Dickinson

X-ray, Moon Missions Launch from Japan

In an ambitious mission pairing, Japan launched a next-generation X-ray observatory and an innovative lunar lander.

Explore the Night with Bob King

Action-packed Sky: Saturn, Comet Nishimura, and More

September is Saturn's time to shine. We also check on Comet Nishimura — now at 5th magnitude and still brightening — and look forward to a dramatic asteroid occultation. Not to mention that Jupiter just took another hit.

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