Geoff Gaherty
Geoff Gaherty was Space.com's Night Sky columnist and in partnership with Starry Night software and a dedicated amateur astronomer who sought to share the wonders of the night sky with the world. Based in Canada, Geoff studied mathematics and physics at McGill University and earned a Ph.D. in anthropology from the University of Toronto, all while pursuing a passion for the night sky and serving as an astronomy communicator. He credited a partial solar eclipse observed in 1946 (at age 5) and his 1957 sighting of the Comet Arend-Roland as a teenager for sparking his interest in amateur astronomy. In 2008, Geoff won the Chant Medal from the Royal Astronomical Society of Canada, an award given to a Canadian amateur astronomer in recognition of their lifetime achievements. Sadly, Geoff passed away July 7, 2016 due to complications from a kidney transplant, but his legacy continues at Starry Night.
Latest articles by Geoff Gaherty
Best Night Sky Events of September 2015 (Stargazing Maps)
By Geoff Gaherty published
See what's up in the night sky for September 2015, including stargazing events and the moon's phases, in this Space.com gallery courtesy of Starry Night Software.
Forget the 'Supermoon': What's Actually Happening at Lunar Perigee
By Geoff Gaherty published
The full moon this Saturday (Aug. 29) will look especially big in the sky, because the moon will be exceptionally close to Earth.
Mars Shines with Cosmic Beehive This Week: How to See It
By Geoff Gaherty published
On Thursday morning (Aug. 20), skygazers will get a special treat, when the planet Mars appears in the midst of hundreds of stars: the open star cluster known as the Beehive, Praesepe, or Messier 44.
Promising Perseid Meteor Shower Peaks Tonight: How to See It
By Geoff Gaherty published
See Mercury, Jupiter and Bright Star Form a Celestrial Trio at Sunset
By Geoff Gaherty published
Best Night Sky Events of August 2015 (Stargazing Maps)
By Geoff Gaherty published
See what's up in the night sky for August 2015, including stargazing events and the moon's phases, in this Space.com gallery courtesy of Starry Night Software.
Full Moon on Friday Is a Blue Moon: Here's Why
By Geoff Gaherty published
On Friday, much of the world will have the opportunity to observe a Blue Moon: A somewhat rare occurrence that doesn't have anything to do with the moon's color.
Dwarf Planet Ceres Reaches Opposition in Night Sky
By Geoff Gaherty published
With all the news about Pluto this month, most skywatchers may not be aware that Ceres, the brightest and nearest of the dwarf planets, reached its opposition to the sun on Saturday (July 25).
See Double Crescents of Venus and the Moon with Binoculars
By Geoff Gaherty published
Venus and the moon are currently shining as crescents in the night sky, and you can see the view with binoculars, if you have good weather and the right gear. Here's how.
See Venus at Its Most Brilliant Tonight
By Geoff Gaherty published
Venus is putting on a show for skywatchers throughout July. Tonight (July 10), Earth's "sister planet" will be at its most luminous, blazing brightly in the western sky.
How to Find Pluto in the Night Sky: July 8
By Geoff Gaherty published
In anticipation of the New Horizons flyby of Pluto on July 14, this sky chart can help you find Pluto in the night sky (with the assistance of a high power telescope).
How to Find Pluto in the Night Sky: July 1
By Geoff Gaherty published
In anticipation of the New Horizons flyby of Pluto on July 14, this sky chart can help you find Pluto in the night sky (with the assistance of a high-power telescope).
Best Night Sky Events of July 2015 (Stargazing Maps)
By Geoff Gaherty published
See what's up in the night sky for July 2015, including stargazing events and the moon's phases, in this Space.com gallery courtesy of Starry Night Software.
Spot Elusive Planet Mercury in the Predawn Sky This Week
By Geoff Gaherty published
Mercury is a difficult object to spot, because it's always clinging closely to the sun’s apron strings. So you might be excused for missing its brief appearance this week in the dawn skies.
How to Spot Asteroid Pallas in Binoculars and Telescopes This Week
By Geoff Gaherty published
Have you ever seen a real asteroid in the sky? This week is an excellent opportunity to see one of the largest asteroids, Pallas, as it reaches opposition to the sun.
Venus Shining at Its Best in the Night Sky
By Geoff Gaherty published
If you've been watching the sky in the early evening lately, you can't have missed seeing the planet Venus in the west and now this planet is putting on brilliant show in the night sky.
Best Night Sky Events of June 2015 (Stargazing Maps)
By Geoff Gaherty published
See what's up in the night sky for June 2015, including stargazing events and the moon's phases, in this Space.com gallery courtesy of Starry Night Software.
Jupiter's Moons Perform Shadow Dances This Week
By Geoff Gaherty published
Jupiter's rapidly moving moons constantly surprise us with their dance around the giant planet. There will be two spectacular shadow plays this week.
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