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Crescent Moon with Aldebaran and Pleiades, April 15-16, 2021

This Week's Sky At a Glance

This Week's Sky at a Glance, April 9 – 17

Arcturus ascends in the east as Sirius sinks in the southwest. Orion tilts further as the Dipper rides high. And this week Mars threads the horntips of Taurus, closely followed by the crescent Moon.

Total solar eclipse 2019 in Chile

Celestial News & Events

T–3 Years Until the 2024 Total Solar Eclipse

The countdown has begun to a special total solar eclipse that will cross Mexico, the U.S. and Canada on April 8, 2024.

Comets

Make the Most of Comet ATLAS

Bright comets will be scarce this year, but you can see one of the better ones this month as it races from Aquila to Canes Venatici. In other news, a new, bright nova has flared in Sagittarius.

Annular eclipse at dawn

Celestial News & Events

First Look at 2021’s First Solar Eclipse

June 10th's annular eclipse of the Sun has a path that crosses southern Canada and the North Pole but will be a challenge to see.

The waning Moon passes under Saturn and Jupiter at dawn, April 6-7, 2021

Celestial News & Events

This Week's Sky at a Glance, April 2 – 10

Winter stars in the west are giving way to spring stars in the east, while little Mars shines on. Meanwhile, the waning Moon passes under Jupiter and Saturn at dawn.

Europa eclipses then occults Io

Explore the Night with Bob King

Mutual Event Season Heats Up at Jupiter

Jupiter is usually the one occulting and eclipsing the Galilean moons, but this observing season the moons also eclipse and occult one another.

Saturn and Jupiter at dawn, early April 2021

Celestial News & Events

This Week's Sky at a Glance, March 26 – April 3

Fading Mars glows above orange Aldebaran high in the west after dark. Orion tilts into his spring posture, with his belt horizontal. Arcturus climbs up in the east.

Deep image of V1405 Cas nova

Stellar Science

Bright Nova Erupts in Cassiopeia

A new nova in Cassiopeia, discovered on March 18th, is bright enough to see in a small telescope.

Moon and Regulus, March 24-25, 2021

Celestial News & Events

This Week's Sky at a Glance, March 19 – 27

The waxing Moon shines with Mars and Aldebaran on Friday evening the 19th. From there the Moon marches east day by day – first between the horn stars of Taurus, then across Gemini to sidle up to Castor and Pollux on the 22nd.

NGC 3190 group / Hickson 44

Celestial Objects to Observe

Exploring Bright Galaxy Groups in Leo

Leo, the Lion, stands high in the southern sky during the early spring. We visit some of the constellation's brighter galaxy clumps then go asteroid hunting.

Moon passing Mars and Aldebaran, March 18-19, 2021

This Week's Sky At a Glance

This Week's Sky at a Glance, March 12 – 20

The waxing Moon passes between Mars and Aldebaran in the evening sky. Arcturus, the "Spring Star," climbs up in the east, while wintry Orion tilts down in the southwest.

Jupiter, Saturn, Mercury, with Moon, March 9-10, 2021

Celestial News & Events

This Week's Sky At a Glance, March 5 – 13

Sirius shines high on the meridian right after dark, as Orion starts tilting westward. Mars keeps company with the Pleiades. And three planets help you greet the dawn.

Battered Vesta

Night Sky Sights

March — A Good Time to Visit Vesta

Dip into this easy guide to seeing the brightest asteroid, Vesta, and understanding what makes it unique.

Mars with Aldebaran and Pleiades, March 4, 2021

Celestial News & Events

This Week's Sky at a Glance, February 26 – March 6

Mars is passing the Pleiades. Sirius and Canis Major take over the early-evening meridian from Orion. And low in the dawn, Jupiter closes in on Mercury.

This Week's Sky At a Glance

This Week's Sky at a Glance, February 19 – 27

Sirius the Dog Star blazes high in the southeast after dinnertime, the brightest star of Canis Major. Spot it lower left of Orion. The stars of Canis Major can be connected to form a convincing dog profile.

IC 418 planetary nebula

Deep Sky

A Deep-sky Hippity-hop through Lepus, the Hare

Snare a dozen bright double stars and deep-sky objects in the celestial Hare the next clear night. We also provide details on how to watch the potentially hazardous asteroid Apophis occult a star the night of February 21st.

Moon passing Mars and Aldebaran, Feb. 18-20, 2021

Celestial News & Events

This Week's Sky at a Glance, February 12 – 20

The Moon, waxing through first quarter, passes Mars and Aldebaran high in the evening sky.

Moon and Antares at dawn, Feb 5-7, 2021

Celestial News & Events

This Week's Sky at a Glance, February 5 – 13

The sky's biggest asterism — at least the biggest one widely recognized — is the Winter Hexagon. It fills the sky toward the east and south these evenings. Start with brilliant Sirius at its bottom. . .

Daytime planet fest

Daylight Phenomena

Planets and Comets Can't Hide from SOHO's Eye

With the help of the Solar Heliospheric Observatory you can not only keep track of the planets in the daytime sky but maybe even discover a comet.

Moon and Antares at dawn, Feb 5-7, 2021

Celestial News & Events

This Week's Sky at a Glance, January 29 – February 6

Once the night is fully dark, spot the equilateral Winter Triangle in the southeast. Sirius is its brightest and lowest star. Betelgeuse stands above Sirius by about two fists at arm's length. To the left of their midpoint is Procyon. Compare their colors!

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