Glenn Roberts
- Indexed articles, last 90 days
- 11
- Latest publication
- Oct 1, 2026
- Outlet visibility, for pniatlantic
- Top 100K sites
- Earliest in this view
- Jul 8, 2026
Latest articles
ATLANTIC SKIES: The Milky Way and Andromeda galaxies are made up of smaller ones - and the newest is breaking all the rules (opens the original)
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Our Milky Way Galaxy is one of the two most prominent members of the Local Group of galaxies. This dumbbell-shaped collection of galaxies includes the Milky Way, along with a number of satellite or companion galaxies, forming one lobe of the dumbbell, and the Andromeda Galaxy and its satellite galaxies forming the other lobe. The term “Local Group” was first introduced by American astronomer Edwin Hubble (1889-1953) in 1930 in his book titled The Realm of the Nebulae. The two primary and largest
ATLANTIC SKIES: The autumn equinox and Harvest Moon are coming - here's what you need to know (opens the original)
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It’s hard to believe that, once again, the autumn season is upon us. We should give thanks, I suppose, that we are all here to witness yet another autumn. Gone are the bright, rosy sunrises of summer, replaced by, if not yet totally dark mornings, then certainly dimmer ones. Flocks of geese flying overhead, trees showing tinges of red, orange and yellow, students waiting for the school bus in the grey light of early morning, purple asters blooming in the garden, and the proverbial cone-shaped ho
ATLANTIC SKIES: How Cecilia Payne changed our understanding of astronomy (opens the original)
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Throughout modern history, women’s accomplishments in the arts and natural sciences have gone unappreciated and unacknowledged, either by chauvinistic dismissal, claims of intellectual inferiority, or, as was too often the case, outright theft by male supervisors or co-workers. Such was the situation facing Cecilia Payne (1900-1979), a British-American astronomer conducting her Ph.D. in astronomy at Harvard University in the USA. Astronomers obtain stellar spectra using spectroscopes attached to
The fastest known star in the Milky Way Galaxy (opens the original)
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Humans, for some inexplicable reason, are fascinated with speed. Whether the speed of a cheetah running down its next meal, the fastest plane or car, or the fastest human to run a specified distance, the “fastest” of anything seems to garner our immediate attention. Well, astronomers have recently discovered something that is far faster than any animal, human, or machine on Earth. The star in question, labelled S301, speeds around the supermassive black hole Sagittarius A* (pronounced Sagittariu
A black hole masquerading as a star (opens the original)
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Black holes are some of the most enigmatic objects in the universe. First conceptualized by the German-born theoretical physicist Albert Einstein (1879-1955) in his theory of general relativity, black holes have only recently been photographed. While it is impossible to optically image a black hole itself, the bright band of light referred to as the “accretion disk” swirling around a black hole can be photographed, as it was in 2019, when the first image of the massive black hole at the center o
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