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dwarf planets

Planets

5 Facts About… Pluto!

Now we weren’t going to leave out everyone’s favourite dwarf planet, were we?! Small but Mighty! Pluto is named after the Roman god of the Underworld, who coincidentally was also the god of wealth as diamond and other jewels supposedly came from the Underworld. It’s ironic that such a tiny Read more…

By Courtney Allison, 3 yearsJune 2, 2020 ago
Comets and Asteroids

V774104: Could a Dark World Put a New Light on Solar System History?

Newly discovered small Solar System body V774104 may seem just another tiny, cold and remote world beyond Neptune but this is an important finding as its mere existence suggests that the wastes of the outer Solar System are considerably more populous than we thought a couple of decades ago.   Read more…

By Armagh Observatory and Planetarium, 7 yearsNovember 12, 2015 ago
Planets

New Horizons at Pluto

Nine years of waiting are over! New Horizons has been to Pluto! Well done humans!   Pluto has turned out to be slightly bigger than we thought having a diameter of 2370 km. This means Pluto is about 30km larger than Eris, making Pluto the largest known object in the Read more…

By Armagh Observatory and Planetarium, 8 yearsJuly 14, 2015 ago
Comets and Asteroids

Dawn at Ceres

NASA’s Dawn Space Craft is already a success story. It was launched on board a Delta II  rocket in 2007, has spent 14 months investigating the asteroid Vesta, is using ion propulsion for acceleration and is now en route to Dwarf planet Ceres, the largest object in the asteroid belt. Read more…

By Armagh Observatory and Planetarium, 8 years ago
Planets

New Horizons to Pluto

When Percival Lowell began the search for “Planet X” little did he know the countless arguments he would cause and effectively how these would lead to a seemingly ever changing solar system. “Planet X” was not the believed birthplace of the X-Men for anyone hoping for the possibility of super Read more…

By Armagh Observatory and Planetarium, 9 yearsSeptember 12, 2014 ago
Comets and Asteroids

VP113 Comes Out of the Darkness

One of the latest members of the Solar System to be discovered, 2012 VP113 is a tiny isolated world in the outer Solar System. It’s attracting attention as it could one day help lead astronomers to discover a whole new planet.   Flying outward from the Sun, away from the Read more…

By Armagh Observatory and Planetarium, 9 yearsApril 2, 2014 ago
Moon

Neptune’s New Moon

If you had asked me in June 2013 how many moons Neptune had, I would have told you the answer was 13.  If you asked me in August 2013 how many moons Neptune had, my answer would be 14!  2013 marks the year when a new moon has been found Read more…

By Armagh Observatory and Planetarium, 10 yearsAugust 30, 2013 ago
Planets

Haumea: Rugby Ball Planet

Dwarf planet Haumea is one of the most bizarre small bodies of the outer Solar System. It has an oddly recent surface. Even just who discovered it is controversial. It looks kind of funny too. The 2011 Rugby World Cup is taking place in New Zealand at the moment and Read more…

By Armagh Observatory and Planetarium, 11 yearsSeptember 30, 2011 ago
Planets

Pluto and Eris: when is a planet not a planet?

In 2003 astronomers discovered Eris, an object seemingly bigger than Pluto, in the frigid Trans-Neptunian wastes of the Solar System. Rather than becoming the Tenth Planet, Eris led directly to Pluto’s demotion from planetary status! But is this saga over? Martina Redpath has the details. I’m sure most of you Read more…

By Armagh Observatory and Planetarium, 12 yearsFebruary 15, 2011 ago
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RSS Intergalactic Craic
  • S3Ep2 - Wee Bitta Craic: Bout Ye Zuri?
    In the latest Wee Bitta Craic episode, Alice and Ethan ask Zuri all about how she came to be at Armagh Observatory and Planetarium doing her PhD. Find out more about Zuri's journey to get to where she is today, and laugh along as the guys have quality banter. If you love listening to our […]
  • 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!
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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