What is a pulsar? As its name suggests it is an object that emits regular pulses of different types of radiation. Normally the pulses are detected as radio emissions but can be detected in the visual wavelengths, x-ray wavelengths and gamma ray wavelengths. Pulsars are neutron stars that have different characteristics to a neutron star. [...]

Lots of signals have gone into space such as TV, radar and radio. The signals have been betraying our presence for 60 years and have passed over about 6000 star systems and are reaching new systems every day. This would seem to be enough, even though we haven’t received anything back yet, but what if [...]

Look up and you will see lots of dots of light. No, it’s not a load of cars screaming towards the Earth because they missed the stop sign at Mars.  It’s stars. There are said to be about 140 billion stars that look like the sun in the Milky Way. There are a lot more stars [...]