If clear skies persist, observers in the UK can view four naked-eye planets between now and the end of the month. Brightest planet Venus is visible low in the west some 45 minutes after sunset, while the waxing Moon is your celestial pointer to Jupiter, Saturn and Mars between 21 and 28 July at midnight.
Friday, 27 July sees the second total lunar eclipse of 2018, which also happens to be the longest of the 21st century. Observers in Antarctica, Australasia, Russia, Asia, Africa, Scandanavia, Europe, Central and Eastern South America will see the event. The Moon rises at mid-eclipse as seen from the British Isles, some 6 degrees north of Mars at opposition.
At the end of July 2018, Mars makes its closest approach to Earth since the memorable opposition of 2003. This summer sees the Red Planet big and bright, low in the south around 1am BST, but now’s the time to train your eye to detect prominent Martian surface features – dust storms permitting! We present our interactive Mars Mapper to help plan your observations.
The Mars Camera, CaSSIS (Colour and Stereo Surface Imaging System), on ESA’s ExoMars Trace Gas Orbiter captured its first high-resolution images of the Red Planet last week. Developed by a team at the University of Bern in Switzerland, CaSSIS is providing spectacular views, including the Hebes Chasma region at a resolution of 2.8 metres per pixel.
Extensive systems of fossilised riverbeds have been discovered on an ancient region of the Martian surface on a northern plain called Arabia Terra, supporting the idea that the now cold and dry Red Planet had a warm and wet climate about 4 billion years ago, according to University College London-led research.
Volcanoes erupted beneath an ice sheet on Mars billions of years ago, far from any ice sheet on the Red Planet today, new evidence from NASA’s Mars Reconnaissance Orbiter suggests. The research about these volcanoes helps show there was extensive ice on ancient Mars. Such an environment combining heat and moisture could have provided favourable conditions for microbial life.
With just a month to go until the 2016 opposition of Mars, the Red Planet is now visible very low in the southeast before midnight for observers in the heart of the UK. Mars and ringed planet Saturn are presently separated by just over 7 degrees — a low power, wide-angle binocular field of view. The waning gibbous Moon passes by on the mornings of 25—26 April.