SpaceLeigh Fletcher interview: Why we urgently need a mission to Neptune To understand the secrets of the most common type of planet in our galaxy, we need to explore ice giants Neptune and Uranus. But we must act now or wait decades for another launch window, says planetary scientist Leigh Fletcher Features
SpaceMarsquakes happen more often during the planet’s northern summer The NASA Insight lander has measured the frequency of shallow marsquakes and found they are more common when it is summer in Mars’s northern hemisphere ¿ìè¶ÌÊÓÆµ