Alastair Gunn
Astronomer
Dr Alastair Gunn is a radio astronomer at the Jodrell Bank Centre for Astrophysics at the University of Manchester.
Recent articles by Alastair Gunn
What do stars look like up close?
What does a star really look like, and how do astronomers know?
How many galaxies are there in the universe?
Do astronomers know how many galaxies exist? How many can we see in the observable Universe?
Radio astronomer answers biggest, trickiest questions about the Universe
We asked a radio astronomer to address some of the biggest unanswered questions about space and the Universe.
What is the temperature of space?
A guide to cosmic thermodynamics and the extreme temperatures of the Universe.
Galaxies are moving away at an increasing rate, carried by the expansion of the Universe
If the Universe is expanding, does that mean all galaxies will be torn apart?
How big is the Universe?
How big is the Universe, and does it have a shape? Or is it merely infinite?
What would happen if you shot a gun in space?
Is it possible to fire a gun in space? What would happen if you did?
The 5 fastest things in the Universe
Way faster than a speeding bullet, these are the quickest things in the cosmos.