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Helium Rain Inside Saturn Might Shape Its Magnetic Field

May 14th 2021 at 09:09

A thick inner layer of slowly falling helium blobs might help explain Saturn's almost perfectly aligned magnetic field.

The post Helium Rain Inside Saturn Might Shape Its Magnetic Field appeared first on Sky & Telescope.

This Week's Sky at a Glance, May 14 – 22

May 14th 2021 at 05:11

The crescent Moon waxes across the evening sky, pairing with Mars in upright-standing Gemini and then, four days later, with Leo's forefoot Regulus. In a telescope, Jupiter and Saturn are becoming not quite so fuzzy as they gain more altitude in early dawn.

The post This Week's Sky at a Glance, May 14 – 22 appeared first on Sky & Telescope.

Sights and Sounds of the Solar System

May 12th 2021 at 20:49

Spacecraft are returning sights and sounds from Venus, Jupiter, and beyond β€” here's a sampling.

The post Sights and Sounds of the Solar System appeared first on Sky & Telescope.

Useful Projects for a Lunar Eclipse

May 10th 2021 at 00:00

Here's all you need to know to help us measure the size of Earth's shadow during the total lunar eclipse on Jan. 20–21, 2019.

The post Useful Projects for a Lunar Eclipse appeared first on Sky & Telescope.

Water-Ice Clouds Could Have Warmed Early Mars

May 10th 2021 at 11:54

New simulations show that the greenhouse effect of high water-ice clouds could have warmed early Mars, permitting the presence of long-ago lakes.

The post Water-Ice Clouds Could Have Warmed Early Mars appeared first on Sky & Telescope.

Nova in Cassiopeia Brightens Suddenly

May 9th 2021 at 23:37

A star in the constellation Cassiopeia that flared into view during mid-March has erupted to naked-eye visibility. Catch it while you can!

The post Nova in Cassiopeia Brightens Suddenly appeared first on Sky & Telescope.

This Week's Sky at a Glance, May 7 – 15

May 7th 2021 at 05:12

Mercury and low Venus adorn the west after sunset, with the crescent Moon soon to join them. Night brings the big Diamond of Virgo and Summer Triangle. Nova Cassiopeiae rebrightens. And Comet Atlas is in evening view with a 6-inch telescope.

The post This Week's Sky at a Glance, May 7 – 15 appeared first on Sky & Telescope.

Tianhe Booster to Reenter This Weekend

May 6th 2021 at 15:38

One of the largest spacecraft to plunge from orbit in recent decades is likely coming down on May 8th.

The post Tianhe Booster to Reenter This Weekend appeared first on Sky & Telescope.

S&T Writers Win Two Science Journalism Awards

This year’s solar physics communication prizes recognize two pieces from Sky & Telescope magazine.

The post S&T Writers Win Two Science Journalism Awards appeared first on Sky & Telescope.

The Hubble Space Telescope As Cosmic-Ray Detector

May 5th 2021 at 08:45

Astronomers, using Hubble Space Telescope as a particle detector, have traced cosmic rays flowing in Earth's geomagnetic field.

The post The Hubble Space Telescope As Cosmic-Ray Detector appeared first on Sky & Telescope.

What’s Inside Neutron Stars?

May 4th 2021 at 08:46

Size measurements of two neutron stars have narrowed down what kinds of exotic matter might exist in their extremely dense cores.

The post What’s Inside Neutron Stars? appeared first on Sky & Telescope.

NASA's Ingenuity Mars Helicopter Enters New Phase of Flight

May 3rd 2021 at 13:06

After a successful first month of flights, Ingenuity will continue to fly through Martian skies on an extended mission designed to test operations.

The post NASA's Ingenuity Mars Helicopter Enters New Phase of Flight appeared first on Sky & Telescope.

May: Halley Bits & Lunar Eclipse

April 30th 2021 at 13:28

Exciting celestial events will happen during May, so download our narrated Sky Tour astronomy podcast to find out about this month's Eta Aquariid meteor shower and a total lunar eclipse.

The post May: Halley Bits & Lunar Eclipse appeared first on Sky & Telescope.

This Week's Sky at a Glance, April 30 – May 8

April 30th 2021 at 05:43

Mercury and Venus now show themselves better at dusk. After dark, Comet Atlas awaits telescopic skyhunters. And the waning Moon passes under Saturn and Jupiter in early dawn.

The post This Week's Sky at a Glance, April 30 – May 8 appeared first on Sky & Telescope.

China Launches First Section of Its New Space Station

April 29th 2021 at 12:25

China has launched the first section of its modular space station Tiangong 3, which will take shape over the coming year.

The post China Launches First Section of Its New Space Station appeared first on Sky & Telescope.

Dark Matter "Wake" in the Milky Way's Outer Reaches

April 28th 2021 at 09:00

Astronomers have discovered that a satellite of the Milky Way has left a "wake" in the dark matter halo that surrounds our galaxy.

The post Dark Matter "Wake" in the Milky Way's Outer Reaches appeared first on Sky & Telescope.

Proxima Centauri Releases Powerful Flare

April 27th 2021 at 08:44

The Sun dwarfs its nearest stellar neighbor, but Proxima Centauri's flares pack a comparatively energetic punch.

The post Proxima Centauri Releases Powerful Flare appeared first on Sky & Telescope.

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