141–160 of 447 results
Trio in Leo

Celestial Objects to Observe

It's Spring! Time to Visit the Bright Galaxies of Leo I

Springtime is galaxy time. Only 30 million light years away, the Leo I Group and nearby Leo Triplet entice the eye with an assortment of bright spiral and elliptical galaxies. Welcome to spring! The new season begins (or began depending on when you read this) at 5:58 p.m. EDT on…

Deep Sky

Deep-sky Hunting in Cancer, the Crab

As winter melts into spring, we sample both familiar and overlooked deep-sky treasures in the "empty space" between Gemini and Leo, home of the Crab.

Daylight Phenomena

How to See Sirius in the Daytime

Spotting Sirius in broad daylight may be easier than you think! Here's how to do it.

Deep Sky

Deep-Sky Observing Without Equipment, Part II — The Winter Sky

Really want to see what your eyes can do? Leave the telescope at home and join me for a naked-eye tour of the late winter sky.

Explore the Night with Bob King

Will Sirius Disappear on February 18th?

On Monday night, February 18th, observers in the western U.S. and Mexico may see the occultation of a lifetime when a tiny asteroid momentarily blots out the night sky's brightest star.

Comets

Comet Iwamoto Ascends and Brightens

Comet Iwamoto is visible as a binocular target from a dark sky. Follow it this week as it passes from Virgo into Leo.

Night Sky Sights

Meet Vega, the Jewel of the Lyre

Meet Vega, the fifth-brightest star in the night sky and the most brilliant star in the constellation Lyra. Vega is in the prime of its life on the main sequence, but it's notable for its speedy spin and infrared-radiating debris disk.

Hyades and horseshoe

Explore the Night with Bob King

Happy Nights with the Hyades

The Hyades open cluster may stand in the shadow of its neighbor the Pleiades, but there's a wide variety of wonders here from naked-eye double stars to challenging galaxies. Let's pay a visit.

Space Satellites

How to “See” Interstellar Space Probes

So far, humans have sent five probes into space that are or will go far beyond the solar system: the Pioneers, the Voyagers, and New Horizons. As an exercise in fun, here's how you can find those probes' locations on the sky.

Explore the Night with Bob King

Comets to Catch in 2019

We peek ahead to see what comets await in 2019. Bright ones will be sparse, but several nice objects, including Comet Iwamoto (C/2018 Y1) and Comet Africano (C/2018 W2), will keep things lively.

Eclipses

Solar and Lunar Eclipses in 2019

There'll be something for everybody in 2019, with total, annular, and partial solar eclipses — and total and partial lunar eclipses to look forward to.

Explore the Night with Bob King

Venus Occults a Star and Mercury Joins Jupiter on the Winter Solstice

Bring in winter with a bang with a beautiful, close conjunction and a rare planet-star occultation.

Comets

Chasing Comet 46P/Wirtanen as the Moon Looms

Learn how chase away the Moon to keep Comet 46P/Wirtanen in a dark sky. Here's an update on the comet's progress and what to look for in the coming nights.

Fomalhaut

Meet the Stars

Meet Fomalhaut, the Autumn Star

The bright star Fomalhaut, home to three suns plus a planet, peeks over the southern horizon in early autumn evenings in the Northern Hemisphere.

Diamond in the sky

Explore the Night with Bob King

SpaceX Launches Orbiting "Sculpture in the Sky" / Comet Update

An art sculpture achieves orbit, 46P/Wirtanen becomes a naked-eye comet, and C/2018 V1 makes one last good pass.

A star goes poof!

Deep Sky

Seeking Cas A, the Ghostly Remains of a Mysterious Supernova

We still don't know for sure if anyone saw the supernova explosion in Cassiopeia around 1680, but there's no question we can observe what remains of it today.

Comet Triple Crown

Celestial Objects to Observe

Comet 46P/Wirtanen Approaches Earth

On December 16th, the comet will pass within 12 million kilometers of Earth and should brighten to about 3rd magnitude, though the diffuse coma and a nearly full Moon will make observations difficult.

A Colorful problem

Deep Sky

Ducks in Disguise or How Stars Hide Their True Colors

Do star clusters form all at once or over several generations? A team of astronomers finds an answer among the spinning stars of an amateur favorite, the Wild Duck Cluster. 

Picture of Rigel and IC 2118

Meet the Stars

Meet Rigel, Orion's Blue Suede Shoe

The seventh brightest star in the sky, blue-white Rigel shines brilliantly at the left foot of Orion and is actually a trio: a supergiant orbited by a pair of Sun-like stars.

Celestial News & Events

Amateur Don Machholz Discovers His 12th Comet! (Updated)

Arizona comet hunter Don Machholz did it again! He discovered his 12th comet only two mornings ago. Set your alarm, grab your scope, and take a look.

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