A stunning double star, Albireo is also a bit of an enigma. Is it a true binary or the result of a chance alignment?
With this week's waxing Moon, we set off to explore its volcanic past with a look at a dozen intriguing lunar domes.
Bees see polarized light and use it to navigate to honey. Learn how you can use it to crack the Egg Nebula.
The intriguing Palomar globular clusters will challenge observers with modest to large telescopes, while providing a satisfying ramble around the galactic halo.
An otherwise faint and distant periodic comet underwent a bright outburst at the end of last month. Now it's visible in amateur telescopes at nightfall.
Learn how to photograph a meteor shower with these step-by-step instructions, as well as advice for the advanced imager.
Now you see 'em, now you don't. Watch the Moon occult Neptune and nearby Lambda Aquarii on the same night.
Take an imaginary journey in a boat down the Milky Way's Great Rift, exploring rich star clouds and dark nebulae along the way.
The phases of the Moon are determined by the relative positions of the Moon, Earth, and Sun.
A survey of free services and apps that let you keep tabs on space weather so you can anticipate the next great aurora.
Take a trip down the rabbit hole to the weird and weighty world of planet-sized white dwarf stars.
Spot Uranus and Neptune, and relive the original discoveries.
Celebrate the June 20th solstice, when the Sun and the full Strawberry Moon combine their powers to illuminate both day and night.
It's showtime for the King of the Rings! Time to get your telescope out to see and share Saturn, which comes to opposition this week.
Let Mars be your guide to no fewer than 15 diverse and delightful double stars that pepper its path through Scorpius and Libra this opposition season.
An old friend from winter returns for an encore in the morning sky. Already visible in binoculars, Comet PanSTARRS (C/2013 X1) may reach naked-eye visibility in June.
Mind your elders the next clear night and pay a visit to some of Spring's biggest and most ancient planetary nebulae.
The recurrent nova T Coronae Borealis last made a splash just after World War II. Does its current restive state hint at an imminent outburst?
With astronomy being celebrated around the globe this month, join the fun by participating in a unique lunar observing challenge: track down 20 features once thought to show evidence of change from weather, geology, and even life.
With the Moon finally put to bed and Comet 252P still bright, there's no better time than now to see it. Nearby Mars and Saturn only sweeten the deal.
Splintered comet duo 252P/LINEAR and P/2016 BA14 liven up both dusk and dawn this week. Naked-eye 252P finally debuts in northern skies, while BA14 makes a beeline through the Big Dipper.
Not one, but two, possibly related comets will make exceptionally close flybys of Earth on March 21–22. Here's what we know and a guide on how to see them.
It's easy to take high-quality images of the lunar disk.
Baptized in the fire of yesterday's total solar eclipse, a very young crescent Moon emerges into the night sky.
Jove begins a new apparition with a redder Red Spot, pirouetting moons, and ever-changing cloudscapes.