Archives | Atom Feed

Annual variations in the jet stream (video)

The weather has been unusual in the past two months: extremely wet and windy in the UK whilst very cold and snowy in the United States. Such large-scale weather patterns are naturally linked to variations in the global atmospheric circulation ...


Social Comet ISON Statistics

Users of Twitter posted up to 12,000 messages per hour during Comet ISON’s perilous encounter with the Sun last Friday. Events like this provide us with an opportunity to understand the demographics of the audience exposed to astronomy ...


Outburst of the Daytime Craterids meteor shower

I am currently attending the Meteoroids 2013 conference in Poland. At the meeting, Prof. Peter Brown has just alerted us to the fact that the Daytime Craterids meteor shower has unexpectedly been detected by the Canadian Meteor Orbit Radar (CMOR ...


Perseids 2013 global observing results

The annual Perseids meteor shower peaked last night between 16h00m and 18h00m UT (12th August 2013). The peak ZHR was about 147 ± 17 meteors/hour.

The graphs below show the visual activity graphs, which I have been generating for the ...


Getting ready for Gaia

Gaia is one of the most ambitious space missions of the decade. Twitter has a lot of talk about it this morning, after one pundit started using the hashtag #NRFG - "Not Ready For Gaia".


Does rainfall affect food prices in Kenya?

Last week I had the pleasure to attend the first “London DataDive” organised by DataKind UK; a non-profit organisation which aims to bring data scientists and social organisations together. The noble idea behind DataKind is that charities and public bodies ...


Watch out for the 2013 gamma-Delphinids

On 11 June 1930, three meteor observers in Maryland (USA) witnessed a flurry of shooting stars originating from the constellation of Delphinus. The mysterious meteor shower, called the gamma-Delphinids, lasted less than 30 minutes. The shower had never been seen before, and it has never returned since... until this year?


Is Java freezing your system? Tune the garbage collector!

I regularly open huge images and tables (>1 GB) in interactive Java-based (astronomy) software such as Aladin and TopCat. Because of the way memory allocation works in Java, the area where objects reside in memory (called the heap) needs to ...


Comet PanSTARRS attracts 2x more men than women?

Two weeks ago, I posted an animation on YouTube showing where Comet PanSTARRS would be visible. The video attracted more than 15 000 hits, and although this is not a proper statistical analysis, I would like to draw attention to ...


Map: when can you see comet PanSTARRS?

Comet C/2011 L4 (PANSTARRS) has brightened dramatically over the past week and is now visible with the naked eye from the Southern Hemisphere. Pan-STARRS is moving north rapidly and will become visible across Europe, North America and Asia ...


How frequently do large meteoroids hit us?

The internet is buzzing about a fireball which caused a powerful sonic boom over Chelyabinsk in Russia, injuring hundreds. A question asked by many is: how common is such event?


From where can you spot 2012 DA14?

On Friday 15 February, a 50-meter asteroid named 2012 DA14 will approach Earth to within a distance of just ~28 000 km. The internet is buzzing about this near-miss because the object is expected to become brighter than 9th magnitude ...


How do you organise $HOME?

Home directories often turn into spooky graveyards of random files, temporary directories and images of lolcats. It takes courage to delete the mess, because there may be one or two important files hiding amongst the pr0n. As a result, many ...


Footprint of the IPHAS Galactic Plane survey

As part of my post-doc at the University of Hertfordshire, I’m helping to calibrate, release and exploit data obtained by the INT Photometric H-Alpha Survey (IPHAS). This is a 1800 deg2 optical survey of the Northern Galactic Plane ...


Visual & video observations of the 2012 Draconids outburst

As reported in my previous post, the Draconids meteor shower showed an exceptional peak on the evening of 8 October 2012 near 17h UT. The peak was very pronounced in data from the Canadian Meteor Orbit Radar (CMOR), which reported ...


Draconids show outburst (again!)

For the second year in a row, reports are emerging about a major peak in the activity of the Draconids meteor shower. Radar observing stations in Canada and in Germany reported up to 1000-2000 meteors/hour between 16h and 18h ...


Welcome!

To celebrate the completion of my PhD and start of a post-doc, I’ve decided to start publishing bits and pieces of research on a blog. I’m hoping this will encourage me to write about results more frequently, hence ...

Built using Pelican. You can fork this theme on github.