SUNSET: 
Explore the Night with Bob King
R Coronae Borealis Awakes and Pluto Blocks a Star
Sometimes, it's just as exciting to watch a celestial object fade or disappear as it is to see it explode. We celebrate the "return" of a mysterious variable star and prepare for Pluto to occult a star.
Explore the Night with Bob King
The Fun Begins at M22
Add a dash of random to your night sky viewing plans and you're guaranteed an adventure. We'll start ours with the famous globular M22 and see where it takes us.
The Black Hole Files with Camille Carlisle
Star Swings Around Black Hole, Tests Gravity
Astronomers have seen a star’s light redden as it passed our galaxy’s central black hole, just as general relativity predicts.
Explore the Night with Bob King
Red Moon Meets Red Planet in Longest Total Lunar Eclipse of the Century
Not only will the Moon will be totally eclipsed this Friday, but Mars will be at opposition and shine in tandem with the red Moon all night!
Astronomy in Space with David Dickinson
HaloSat: A Small Satellite for a Big Question
HaloSat, a mini-satellite recently deployed from the International Space Station, is on the hunt for the universe's missing matter.
Explore the Night with Bob King
PanSTARRS Comet, Rocked by Outburst, Goes Green
Comet PanSTARRS (C/2017 S3) has erupted again! Now bright enough to see in binoculars, it might become a naked-eye object if it survives until perihelion.
Cosmic Relief with David Grinspoon
Advancing the SETI Quest
Hope, perseverance, and the courage of their convictions sustain those seeking hints of alien civilizations and advancing the SETI quest.
Astronomy in Space with David Dickinson
Planet-Protection Policies: Due For Revision?
A new National Academies study assesses NASA's efforts to protect neighboring worlds from contamination and recommends ways the space agency could do a better job.
Explore the Night with Bob King
Observers Anxious for Dust to Settle as Mars Opposition Approaches
With opposition only weeks away, will the current global dust storm finally break? We look at the prospects.
Astronomy in Space with David Dickinson
Nautilus Expedition Recovers Possible Seafloor Meteorites
The expedition off the coast of Washington state performs a first, recovering meteorite fragments from a documented fall.
Imaging Foundations with Richard Wright
Understanding ISO for Astrophotography
Does increasing the ISO on your DSLR make it more sensitive? No! Yes! Depends! Find out how ISO affects your astrophotography.
Explore the Night with Bob King
Don't Miss Aldebaran's Last Occultation Till 2033
The last and one of the most picturesque occultations of Aldebaran by the Moon happens on Tuesday morning, July 10. Catch it or wait 15 years for the next!
Explore the Night with Bob King
Fireworks, Planets, Comets, a Nova — July's Got it All!
July's a busy month for skywatching. Not only are five bright planets in view, but three comets and a newly-discovered nova are also observable. And it all starts with a bang on Independence Day.
Explore the Night with Bob King
The Eyes Have it — Deep-Sky Observing Without Equipment
No telescope? No problem. Just use your eyeballs! On a dark summer night at least two dozen deep-sky objects can be seen without optical aid.
Astronomy in Space with David Dickinson
Hayabusa 2: Welcome to Ryugu
We got a peek at a new worldlet in the inner solar system this week, as the Japanese Aerospace Agency's (JAXA) Hayabusa-2 gave us our first good looks at the tiny asteroid 162173 Ryugu.
Explore the Night with Bob King
Big Dust Storm Blows up on Mars (Updated)
Will Mars soon be hidden under a veil of dust? Let's hope not. We explore the current storm and the planet's upcoming close opposition.
Explore the Night with Bob King
Quest for the Green Flash
If you like sunrises and sunsets, look for the green flash, a phenomenon that happens more often that you think.
Imaging Foundations with Richard Wright
The Case for Monochrome
Quality monochrome (black-and-white) images are a much easier route to early success in astrophotography — find out how to get started.
The Black Hole Files with Camille Carlisle
Black Hole Destroys Star and Shoots Jet
Astronomers have watched the growth of a jet fueled by a shredded star.
Astronomy in Space with David Dickinson
NASA's Dawn Probe Reaches Its Low, Final Orbit
NASA's Dawn spacecraft has entered a new and final orbit that will take it less than 30 miles above the surface of asteroid Ceres.
