Universe

Exploring the Archives at Armagh Observatory and Planetarium

As a student of Public History, I am fascinated by the invaluable, yet often underappreciated role played by archives and archivists. I was therefore delighted to undertake a thirty-day internship at the archives of the Armagh Observatory and Planetarium (AOP) as part of my Masters course. Under the supervision of Matthew McMahon, Museum Collections Officer, I spent the first portion of my time at the AOP archiving. This mainly included working with uncatalogued material and Read more

By Heather Alexander, ago

Royal Irish Academy honours late Professor Denis O’Sullivan with Nobel Laureate Masterclass

Nobel Laureate Professor Reinhard Genzel delivers masterclass to top Irish students of astrophysics and high-energy particle physics. On Wednesday 18 February the Royal Irish Academy hosted thirteen postgraduate students for a masterclass facilitated remotely by Nobel Laureate Professor Reinhard Genzel. Professor Genzel is Director of the Max Planck Institute for Read more

By Heather Alexander, ago

ARMAGH OBSERVATORY AND PLANETARIUM ASTRONOMERS DISCOVER METAL SCAR ON CANNIBAL STAR

February 2024 Leading astronomical research centre Armagh Observatory and Planetarium has played a key role in the discovery of a unique signature of the process by which white dwarf stars cannibalise their planetary systems. The research was conducted by an international team of scientists using the European Southern Observatory’s Chile-based Read more

By Heather Alexander, ago

5 Interesting NGC Objects!

NGC stands for the New General Catalogue of Nebulae and Clusters of Stars, which is an astronomical catalogue of deep sky objects and was compiled in 1888 by the 4th director of the Armagh Observatory John Dreyer. To this day the NGC catalogue is still used by Astronomers all over the world and remains one of our many claims to fame! The catalogue contains 7840 objects Read more

By Ria Mee, ago

COVID Astronomy: Watching a bus-sized asteroid whiz by Earth during a pandemic

by Galin Borisov and Apostolos Christou This September, we had the first opportunity to make astronomical observations while physically present at the telescope since the start of the COVID19 pandemic. Our instrument of choice was the 2-m RCC telescope at Rozhen Observatory on the Rhodope mountains in SW Bulgaria. So here we are at 1700m above sea level with a forecast for good weather and ready for new discoveries! One Read more

By Apostolos Christou, ago

How to name an Asteroid

The first asteroids discovered in the early 1800’s were named after Roman and Greek mythological figures like Ceres, Pallas, and Vesta. Today, most asteroids are named after people, both real and fictional, places, animals, plants, and other natural phenomena. The discoverers of asteroids are responsible for proposing the name however Read more

By Sinead Mackle, ago

IAU puts the Hubble-Lemaître Law to the Vote – an update!

As an earlier Astronotes article reported on, during its XXX General Assembly in Vienna, held in August 2018, the International Astronomical Union (IAU) put forward a draft resolution to rename the Hubble law as the “Hubble–Lemaître law”. The resolution was proposed to recognise Lemaître’s research on the expansion of the Universe, and to pay tribute to both Lemaître and Hubble for their fundamental contributions to the development of modern cosmology.

By Armagh Observatory and Planetarium, ago

Exo-Moons and Goblins

The discovery of planets orbiting around other stars has been one of humankinds greatest achievements. The existance of these ‘exo-planets’ can challenge our perception of our place in the universe. Since the first confirmed detection of a planet around another normal star (51 Peg) in 1995, many thousands of planets have been discovered. Indeed, it is likely that most stars will have their own system of planets. It is important in answering the question – is there intelligent life out there?

By Armagh Observatory and Planetarium, ago

Hydrogen-Deficient Stars 2018 – Armagh Observatory and Planetarium

September 2018 will see over 50 astronomers from around the world gather at the Armagh Observatory and Planetarium to discuss the latest news about hydrogen-deficient stars. These stars have lost nearly all the hydrogen from which they were made, to leave only nuclear ash. Astronomers want to learn how these rare and short-lived remnants formed, and what drives their spectacular changes in brightness. 

By Armagh Observatory and Planetarium, ago

Measuring the Universe – 150th birthday of Henrietta Swan Leavitt

July 4, 2018 saw the 150th birthday of Henrietta Swan Leavitt (1868 – 1921), one of the most important astronomers of the 20th century. Born in Lancaster, Massachusetts, Leavitt graduated from Radfcliffe College, Harvard, in 1892. She then stayed on at the Harvard College Observatory as a volunteer research assistant. Whilst attempting a graduate degree in astronomy and travelling in Europe, she became ill with grave consequences for her hearing. In 1902, then director, Edward Pickering, invited Henrietta to join the permanent staff at Harvard, where she was assigned to study “variable” stars.

By Armagh Observatory and Planetarium, ago