The Discussion: Helping us celebrate our 100th(ish) episode, we have a live(ish) audience to join in with us. Anna Lanteri from Gröningen University discusses a new Zooniverse citizen science project, called Space Fluff where you can soon classify dwarf galaxies. And Tom Bridgman from the Goddard Space Flight Centre tells us about NASA's Scientific Visualization Studio.

The News: Rounding up the astronomy news this month we have:

• Astronomers find an exoplanet in another galaxy using x-rays
• A group of underground liquid water reservoirs found on Mars
• The first exoplanet observed around a white dwarf star
• Asteroid Vesta litters other asteroids

Main News story: We are finally out of solar minimum and the sun will get more active again.

The Sky Guide: This month we're taking a look at the constellation of Cetus with a guide to its history, how to find it, a couple of deep sky objects and a round-up of the solar system views on offer in October.

Guide to the Electromagnetic Spectrum: In this series we take a look at the electromagnetic spectrum, what, it is, what is shows us and why it's so important to astronomers. This month we explain the x-ray part of the spectrum and its relevance to astronomy.