Comet C/2011 L4 PANSTARRS has been wowing observers in the southern hemisphere recently and there have been some fantastic images taken of it. So when do we in Armagh get a chance to see this visitor from the Oort Cloud? The answer is next week! Comet PANSTARRS reaches perihelion, Read more
Imagine you had a window looking over our world. What pictures would you take and what sights would you see? Thanks to the astronauts onboard the International Space Station we can see the beauty of our Earth from the unique position of space. This is a view the majority of Read more
From early civilizations until today man has sought to explore and discover what is beyond our world. From the ancient discovery of the wandering stars to the thousands of potential new planets found this decade, mankind has sought to make many astronomical advances. However some of these ‘breakthroughs’ that occurred Read more
Percival Lowell was born into a wealthy Boston family on 13 March 1855. ‘No man is an island’ so like all of us he was a product of his times and class and also like many he rebelled against family traditions and expectations. He is best known for his ‘canals Read more
Comet ISON is here! This new comet was in January 2013 just a dim speck in the constellation Gemini, between the stars Castor and Pollux. Astronomers could not agree if it was going to develop into the greatest astronomical spectacle in a decade or into a dim and disappointing smudge- Read more
The ‘Lifestyles of the rich and the famous’ are usually splashed across the fronts of magazines and tabloids and it’s pretty common today know more than necessary about many people in the public eye. However, back in the 16th century the same media format had not quite been established. Despite Read more
Since before the dawn of history we have admired our planet’s amazing moon and enjoyed its beautiful light.Since the 1600s we have known that some of the other planets of the Solar System have multiple moons.This started some astronomers thinking; perhaps we do have more than one moon! If Read more
Comet ISON is coming!This newly-discovered comet may by November 2013 be an unforgettable spectacle, dominating the night sky.The comet may be even brighter than the fondly-remembered Hale-Bopp of 1997! C/2012 S1 (ISON) was announced on 24 September 2012.It was spotted by Vitali Nevski and Artyom Novichonok on CCD images Read more
An intruder from beyond Earth’s atmosphere can be seen in this image of the 21 September fireball taken by amateur astronomer Colin Campbell from his garden in Lisburn. Here is how Colin describes how he captured this remarkable image: I was out in my garden experimenting with taking a Read more
Humans have been looking up to the night sky wondering and discovering what lies beyond for thousands of years.We have detected super massive black holes, discovered distant galaxies and located extra-solar planets outside of our Solar System.Despite this we have not discovered any other life forms beyond our own planet.Perhaps Read more
I was visiting the Tall Ships event in Dublin recently when I noticed something strange in the light blue daytime sky! Overlooking the River Liffey I could see something that looked like the Moon, but the Sun was still shining, so it couldn’t have been the Moon – or was Read more
It’s the beautiful clear morning of 6 June 2012 here in Armagh and the Sun is rising into a cerulean blue sky.But look closer, and you can see a tiny circular black speck on the face of the Sun.This is a transit of Venus, one of the rarest spectacles in Read more
Sir Frederick William Herschel is one of the most well-known and highly regarded historical astronomers but many may not know or realise there was more to his genius than his passion for astronomy. So it seems a closer look is required to try and map out the life of such Read more
Once, in complete silence, a large boulder rolled down a slope on the central peak of the Moon’s Schiller crater. This rock is about 9m (30ft) across, meaning that it would fit neatly inside Armagh Planetarium’s 11 m wide Digital Theatre. The Moon’s surface has been to all intents and Read more
Where does space begin? Let’s look up into our planet’s atmosphere, that shell of nitrogen (about 78%), oxygen (about 20%), various other gases (2%) that makes life on Earth possible, to find out. The atmosphere gets thinner as you go further up, in fact 90% of the Earth’s atmosphere by Read more
Venus has always been regarded as Earth’s Sister Planet. After all, it can be the closest planet to us and it is nearly the same size as Earth. But how similar is it really to Earth? Astronomers get asked this question very often: “I saw this really bright light Read more
The aurora is a stunning celestial event associated with Earth’s polar regions. Recently Ireland has been witness to this beautiful phenomenon. If you are standing looking up at the sky in Canada, Alaska or in Norway on a clear dark night you may see a bright reddish or greenish Read more
James Moriarty (?-1891) was one of the greatest of the many astronomer-mathematicians who flourished in the nineteenth century, however among the general public his scientific accomplishments are forgotten. Mention his name and most people will think of the dark rumours about his personal life and the lurid circumstances of his Read more
Helene is a tiny moon of Saturn that shares an orbit with the much larger moon Dione. Helene reposes at a gravitationally stable position called a Lagrange point. Helene orbits Saturn ahead of Dione, and viewed from above the centres of Dione, Saturn and Helene form a vast equilateral triangle. Read more
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
202 million km (1.35 AU or 125 million miles) from Earth an explorer from Earth is investigating the giant asteroid Vesta. This intrepid pioneer is the Dawn space probe. Orbiting about 2700 km (1700 miles) above Vesta, Dawn slowly rotates around the world beneath it. Every 69 hours, the Read more
NASA’s Mars Reconnaissance Orbiter has returned thousands of fascinating images of our neighbouring world, here is a selection some of the most striking and thought-provoking (false colour) images. Part of the Martian surface that has cracked into a natural maze, Noctis Labyrinthus (the Labyrinth of Night), lies at the west Read more
This portrait of the Earth and Moon together in space was taken on 26 August by NASA’s Juno spacecraft which is currently en route for Jupiter. The image was made when Juno was about 10 million km away as part of the checking procedure for the probe’s instruments. If you Read more
“Is there life on Mars?” More than fifty years into the Space Age and there still is no definitive answer. Completing our series of posts on this mystery, we look at the latest ideas about the existence of beings on our neighbouring planet. In the previous part of this Read more
Could water be streaming down Martian mountainsides? This startling vision may be a reality according to recent results from NASA’s MRO spacecraft. Here is the latest on the waters of Mars. Although we are exploring the surface of Mars through marvellous rovers like Spirit and Opportunity and their forthcoming big Read more
The approaching Comet Elenin has triggered suspicious and fearful speculation among some observers. A contribution to this brouhaha has been the lack of images of this visitor from deep space, but at last there are images from a NASA space observatory of this oncoming comet. On 1 August 2011 Comet Read more
We have been celebrating the first Neptunian year since the discovery of the eighth (and as far as we know last) planet in the Solar System. Neptune’s discovery was a famous triumph of nineteenth century astronomy. Less well-known is the aftermath, when a ninth solar planet was discovered. This planet Read more
Neptune, furthest planet from the Sun is celebrating its first birthday. It has been known to humans for only a single Neptunian year. Neptune, which is not visible with the naked eye, was discovered by mathematical prediction in 1846 before being observed through a telescope. Astronomers noticed that Uranus was Read more
The peak at the centre of Tycho Crater on our Moon has been imaged by the Lunar Reconnaissance Orbiter spacecraft. Let’s take a look at this spectacular mountain of the Moon. One of the best-known lunar craters, Tycho is not especially large at some 85 km across. However it is Read more
NASA’s Dawn spaceprobe is approaching the asteroid Vesta. At a distance of 483 000 km, the spacecraft has made images rivalling the best Hubble Space Telescope views of this fascinating little world. Between Mars and Jupiter lies the Asteroid Belt. Relics of the Solar Nebula which birthed the planets, these Read more
Scientists had seriously considered the possibility of plant or even animal life on the surface of Mars for more than a century. However negative results from NASA’s Viking spacecraft in the 1970s ruled out large-scale Martian life but this was not the end of the search for life on Mars. Read more
“Is there life on Mars?” This must be one of the most-asked questions in astronomy. In this article I am going to look at the historical background to this question. Current thoughts on the possibilities of Martian life will be considered in a follow up article. Why is life Read more
Comet Tempel 1 is by far the most closely studied comet in history. We saw it up close for the first time in July 2005, when NASA’s Deep Impact mission flew past it, pelting in with a projectile on the way. On 14 February 2011, another NASA mission, Stardust-Next visited Read more
The Zodiacal light is a rarely seen yet intriguing spectacle in a dark sky. Sinead McNicholl reveals the connection between the zodial light and a famous rockstar! Have you ever noticed a whitish glow in the night sky which appears to extend upwards in the shape of a triangle or Read more
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
NASA’s Deep Impact probe flew past comet Hartley 2 and revealed a odd-looking peanut-shaped nucleus. What are the first impressions from these exciting images? Only about a mile (1.6 km) from end to end, the nucleus of Comet Hartley2 is hardly the most impressive member of the Solar System. Never Read more
Between Mars and Jupiter lies the Asteroid Belt, a swarm of millions of shards of rock, metal and ice. Somewhere out here, between 5-10 February 2009, a small asteroid, perhaps 5m across, violently slammed into another, larger (120 m), asteroid at a closing speed of about 18 000 km/h. As much Read more
Ask anyone to draw a picture of a planet and I’ll bet they draw a ringed planet like Saturn. This giant world has always stood out from the other worlds of the Solar System thanks to its amazing rings, in astronomy books it was ‘The Ringed Planet’. Thirty years Read more
The team at the Japanese Aerospace Exploration Agency deserve congratulations for the amazing (and hopefully record-breaking) Hayabusa mission to asteroid 25143 Itokawa. Launched in 2003 (the spacecraft was called MUSES-C at launch, but was renamed in flight), this mission has battled against an extraordinary run of bad luck and technical Read more
Here’s how rainbows are made. Some 13.7 billion years ago, a mere millionth of a second after the Big Bang, the first hydrogen and helium nuclei condensed out of a hot, dense soup of quarks and gluons. It took another 380 000 years or so for conditions in the ancient Read more
In March 2010 that superb but underappreciated probe Mars Express made a series of very close passes by the Martian moon Phobos. On one occasion it came as close as 107 km to the tiny world’s surface. The purpose of these encounters was to determine information on Phobos’ interior Read more
Venus was once thought to be a lush, life-bearing planet, but modern research has revealed an utterly lethal world. What perils await explorers of “Earth’s evil twin”? Is there anyone who hasn’t admired the lovely beacon of Venus hanging bright in a cerulean sky? (So bright in fact, it Read more
At first glance Gliese 710 is not a very distinguished star. A K7 class orange dwarf a bit more than half as massive as the Sun, it currently lies about 63 light years from us in the constellation Serpens. It is moving fast though and that is why one reason Read more
Saturn: the Blue Planet? The NASA/ESA Hubble Space Telescope reveals the secrets of the giant planet. This false colour image from the Hubble Space Telescope not only shows Saturn in an unfamiliar light, but displays some of the giant planet’s features. The image was created in early 2009, when Saturn Read more