Paul Roche

Astronomer

Professor Paul Roche is Chair of Astronomy Education at Cardiff University.

Recent articles by Paul Roche

This artist's concept shows a black hole with an accretion disc expelling a jet of hot gas, called plasma. Image Credit: NASA/JPL-Caltech

What is an accretion disk and how does one form?

light ring orbit black hole

11 questions about black holes – answered!

Illustration showing a star being ejected from the centre of a galaxy. Credit: NASA/ESA/G. Bacon (STScI)

Do rogue stars roam in between galaxies?

A view of the Sun captured by ESA's Solar Orbiter, 30 May 2020. Credit: Solar Orbiter/EUI Team (ESA & NASA); CSL, IAS, MPS, PMOD/WRC, ROB, UCL/MSSL

10 big questions about the Sun – answered

Field of stars in the constellation of Crux. Credit: ESO

How many stars are born each day?