Watch Tim Peake’s spacewalk live

Astronomy Now Online brings you a powerful interactive global Almanac and UK-based all-sky star maps — the first of a new suite of tools to help plan your observing sessions and travel.

Scientists are using photographs taken by astronauts aboard the International Space Station (ISS) to reliably measure the amount of light pollution worldwide and to produce a global colour map of the Earth at night. The total cost of the energy consumption for streetlights is estimated by the study to be 6300 million euros/year in the European Union.

The NICER telescope array aboard the International Space Station has made the most accurate measurements yet of a pulsar’s mass and size.