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supernovae

July

Stargazing in July

Looming large in the after dark southern sky in July is the large and overlapping but often overlooked constellations of Ophiuchus and Serpens. Lacking outstandingly bright stars these “two for one” constellations still contain much of interest.   Ophiuchus is one of the thirteen constellations that cross the ecliptic, making Read more…

By Armagh Observatory and Planetarium, 9 yearsJuly 22, 2014 ago
Other Galaxies

Supernova in the Cigar Galaxy

Once again, astronomers around the world are investigating a stellar explosion, a supernova, in M82, a galaxy 12 million light years away in the constellation Ursa Major. Although supernovae are awesomely destructive, this event is far, far too distant to cause any danger at all to our planet.   Discovered Read more…

By Armagh Observatory and Planetarium, 9 yearsJanuary 22, 2014 ago
Stars

How Far Away is the Farthest Star?

Looking up in to the night sky it’s not difficult to see why the ancient Greeks believed that all the stars in the night sky were fixed on a celestial sphere revolving around the Earth and other planets. From our view on Earth the stars appear to be at a Read more…

By Armagh Observatory and Planetarium, 10 yearsJune 17, 2013 ago
IMAGE of cosmic ray tracks
Cosmology

100 Years of Cosmic Rays

Ever had a frustrating morning and wished you could ‘Hulk-out’ or that some superhuman abilities were within your grasp even for the briefest of moments?With the psyche of superheroes very much to the fore in contemporary culture, it is perhaps interesting to learn that emissions similar to those of human Read more…

By Armagh Observatory and Planetarium, 10 yearsSeptember 21, 2012 ago
Milky Way

Everything You Need to Know About the Milky Way

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By Armagh Observatory and Planetarium, 10 yearsSeptember 14, 2012 ago
Star types from left to right: a red dwarf, our Sun, a blue dwarf, and R136a1 (hypergiant). Where star sizes are measured by radius, from centre to surface, and where 1 solar radius is equal to that of our Sun (km) - R136a1’s radius is 35.4 times greater than the Sun [approximately 24.8 million km]. Credit: Author: ESO/M. Kornmesser
Stars

The Largest Stars in the Universe

How big is the largest known star? Compared to planets, stars will always be the overall group winners in terms of superior size. When you look at the night sky on a clear night and away from city lights, you will see that there are stars of varying sizes and Read more…

By Armagh Observatory and Planetarium, 11 yearsMarch 14, 2012 ago
Image of carina nebula
Nebulae

What is a Nebula?

Beautiful colour images of nebulae grace astronomy books and websites and have spread to mainstream culture. They are now familar to the public but what are these gaudy celestial spectacles?   So what is a nebula? Nebula is latin for ‘cloud’ so it is the word astronomers use to call Read more…

By Armagh Observatory and Planetarium, 11 yearsFebruary 24, 2012 ago
Stars

6 Theories about the Star of Bethlehem

What was the Star of Bethlehem? Recorded only in the Gospel of Matthew, this mysterious celestial object is said to have heralded the Nativity. For millennia stargazers have wondered what it may have been.     Now when Jesus was born in Bethlehem of Judea in the days of Herod Read more…

By Armagh Observatory and Planetarium, 11 yearsNovember 10, 2011 ago
Nebulae

The Mysterious Heart of the Crab

The debris from a vast cosmic explosion, the Crab Nebula in Taurus is a well-known spectacle. But what is it and how was it formed?   On 4 July 1054 AD Yang Wei-T’e (?-?), astronomer to the Chinese emperor, carefully recorded a ‘guest star’ in the constellation of Taurus. Yang Read more…

By Armagh Observatory and Planetarium, 11 years ago
Cosmology

Are Neutrinos Faster Than Light?

Neutrinos travel faster than light! The science world is agog at this unexpected announcement from CERN  in Switzerland. This result has to be verified, for if true it seems that one of science’s central tenets is wrong!   It’s all Einstein’s fault of course. Albert Einstein (1879-1955) came up with Read more…

By Armagh Observatory and Planetarium, 11 yearsSeptember 26, 2011 ago

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RSS Intergalactic Craic
  • S3Ep1 - Wee Bitta Craic: Welcome Ethan, Alice and Zuri!
    Want a Wee Bitta Craic? Then say hello to some of our PhD students, Ethan, Alice and Zuri. They will be hosting their own Wee Bitta Craic episodes and will give you an insight into the life of a PhD students here at AOP!
  • Season 3 - What's the craic?
    What's the Craic? Intergalactic Craic is back and it's shaking things up! Join Heather and her brand new co-host to find out more!
  • Space is Cloudy, Who Knew? Featuring Kerem Çubuk
    This week Heather and Courtney interview Armagh Observatory PhD Candidate Kerem Çubuk on his area of research - molecular clouds! Turns out we can't escape the cloudy conditions, even millions of lightyears away.  Kerem and his colleagues also have a Youtube Channel dedicated to science communication in Turkish. To find out more, visit ahtapot.club 
Welcome to Astronotes

Hello and welcome to Astronotes, the Armagh Observatory and Planetarium’s official blog. Here you will find the latest news and views from all those who work in our organisation, from the fascinating worlds of astronomy and space exploration. We hope you will come here to learn what is hot and exciting, profound or even weird from worlds beyond ours . So that's the introduction out of the way, now on with the Universe!

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