December 31 2016 Leap Second

On New Year's Eve an extra second will be added to the end of the day. This extra second is called a leap second. As I'll explain later, leap seconds need to be added periodically to bring the time we measure with accurate atomic clocks in line with the natural time which results from the rotation of the… Continue reading December 31 2016 Leap Second

An idea for Christmas from Explaining Science

   Revised 12 December 2025 Now that Christmas is nearly upon us, if you've not done so already why not treat yourself to an e-book from Explaining Science. If you'd like to know more about popular astronomy , I've written three e-books which are available in the Amazon Kindle store at a nominal cost. By… Continue reading An idea for Christmas from Explaining Science

The long summer evenings

This post talks about two interesting effects to do with the way it get dark after the Sun has set.  The first one, which anyone who has travelled to places lying at different latitudes will have seen, is that the closer you are to the equator the quicker it gets dark after the Sun has… Continue reading The long summer evenings

What Went Wrong with the Schiaparelli Mars landing

The failure of the Schiaparelli landing

The Schiaparelli probe tragically failed to land on Mars due to its parachute malfunctioning, resulting in a crash at high speed. Despite this setback for the European Space Agency, the ExoMars Trace Gas Orbiter remains successful, set to study methane in the Martian atmosphere, making the overall mission worthwhile.

Schiaparelli’s landing on Mars

The Schiaparelli spacecraft on Mars

The Schiaparelli Spacecraft tragically failed to land on Mars, crashing at 300 km/h. Launched on March 14, 2016, with the ExoMars Trace Gas Orbiter, it aimed to study Martian surface conditions. It only planned to be operational for a week because it lacked solar panels, relying solely on a non-rechargeable battery.