Marsquake! This month's episode follows Insight, NASA's latest mission to the Red Planet, as it goes in search of the secrets buried deep below Mars's surface. By listening for tremors caused by Marsquakes and meteor strikes, scientists hope to reveal how the planet was formed, why its fate was so different from the Earth and whether the planet is dead or alive.

The programme also says a heartfelt goodbye to Opportunity, the rover that explored the surface of Mars for more than 14 years until it was engulfed by a dust storm last year.

In the first of two programmes to commemorate the 50th anniversary of the Apollo Moon landings, the Sky at Night team take a look at the latest plans to return to the Moon. Recently, China, Israel and India have all sent major missions to the Moon. The Europeans and Americans are planning to build a space station in permanent orbit around the Moon. And NASA has just announced that they plan to land astronauts on the Moon's surface within five years. It all suggests that we are on the verge of a new golden age in lunar exploration.