Venus

Solar System

Venus: Thin-skinned and Likely to Blow

Scientists found a strange little volcanic feature on the edge of a Venusian corona, giving further credence to the theory that the planet has a thin outer layer and an active interior.

Jupiter and GRS

Celestial News & Events

Jupiter Dazzles at Its Brightest and Closest This Year

Jupiter comes to opposition on August 20th, when it will shine brighter and closer than at any other time this year. With nights starting earlier and cooler temperatures arriving, there's no better time to make the most of the planet.

New model of Saturn's interior

Solar System

Saturn Has a Fuzzy Core, Too

New research reveals that Saturn, like Jupiter, has a “fuzzy” core that extends 60% of the way to its surface, a finding that is changing how astronomers think about giant planets.

Gale Crater

Solar System

Gale Crater on Mars: An Ancient Lake or Just Puddles?

A new study suggests that wind, not water, created the rock layers in Gale Crater, where the Curiosity rover roams.

Black hole accretion disk

Black Holes

How Black Holes Eat Reveals Their Mass

No one knows why quasars flicker — but astronomers are using these wavering beacons to "weigh" the black holes that power them.

The waxing gibbous Moon passing over Scorpius, Aug. 16-17, 2021

Celestial News & Events

This Week's Sky at a Glance, August 13 – 21

The Moon waxes from first quarter to gibbous in the evening sky, offering some of its most interesting telescopic aspects. Venus grows more insistent in the western twilight. And Jupiter and especially Saturn pose well in the southeast to south by late evening.

Celestial News & Events

Fine Show Expected from the Perseid Meteor Shower

With no interference from the Moon, this year's Perseid meteor shower should be excellent. If you couldn't catch the show last night, try looking up tonight!

First Sample

Solar System

Mars Perseverance Rover Hits a Snag on First Sampling Attempt (Update)

Perseverance came up empty on its first attempt to grab and stow a sample of Mars.

A diamond-shaped grey asteroid with ridges, holes, and craters in it, against a black background

Solar System

Don’t Worry About Bennu (Yet)

Careful measurements using the OSIRIS-REX spacecraft have refined astronomers’ predictions for how likely it is that this potentially hazardous asteroid will strike Earth.

Night Sky Sights

Learn to Star-hop in the August Sky

Learn to star-hop your way to celestial treasures in the August sky.

an illustration of a flaring red dwarf, with a disk of gas and dust containing an earth-like exoplanet.

Exoplanets

Red Dwarfs Aren’t So Bad (For Planets) After All

Red dwarf stars appear to flare preferentially at high latitudes, which might keep their exoplanets habitable instead of hellish.

RS Oph animation

Celestial News & Events

Recurrent Nova RS Ophiuchi Just Blew its Top!

The recurrent nova RS Ophiuchi just went into outburst — its first burst in 15 years — and it's bright enough to see with the naked eye

People, Places, and Events

S&T Editor Wins Planetary Science Writing Award

Science Editor Camille Carlisle has won the Division of Planetary Science’s Jonathan Eberhart Planetary Sciences Journalism Award for “Rugged Worlds,” the cover story of the May 2020 issue of Sky & Telescope.

Venus flybys

Solar System

Two Space Probes to Pass by Venus (Update)

Two spacecraft are heading for a close Venus encounter: Solar Orbiter passes by on August 9th and BepiColombo on August 10th.

Crescent Moon passing Venus, Aug 9-11, 2021

Celestial News & Events

This Week's Sky at a Glance, August 6 – 14

It's Perseid meteor week! Venus lights the western twilight. Saturn and Jupiter are up in the southeast by mid-twilight and await your telescope later at night. And explore the deep-sky glories of Sagittarius before moonlight returns.

Spektr-R

Space Missions

Russian Rocket Booster to Reenter Early Next Week

The spent rocket booster that deployed the Russian Spektr-R satellite a decade ago is now set to burn up over the Indian Ocean on Monday, August 9th.

Solar System

Two Extremely Red Asteroids Discovered Far from Home

Astronomers have discovered the two reddest objects in the asteroid belt, and their origin story might tell us more about planet formation.

Comet Interceptor

Solar System

How the Comet Interceptor Will Chase Visitors to the Inner Solar System

How will engineers plan the trajectory of Comet Interceptor, a mission designed to fly by an interstellar visitor, when its target is still unknown?

Jupiter-Saturn-Moon in mid-August 2021

Sky Tour Astronomy Podcast

Welcome, Jupiter & Saturn!

The Perseids are upon us — and as you're looking out for shooting stars, look for Jupiter and Saturn low in the southeast as soon as night begins to fall.

Solar System

"Liquid Water" Below Martian Surface Might Be Clay

Mysterious spots that scientists thought were subsurface lakes beneath the Martian south pole may instead be ancient clay deposits.