Note: this is the first instalment of a five-part series.
I’m a fan of space. I don’t actually know much about the details of astronomy or cosmology or astrophysics; I just think that the space is really cool.
If there are any real scientists reading this, I want to say thanks. I know that most of your work involves boring and tedious searching, collating and number crunching. Thanks for doing all that stuff so that I can see those fantastic pictures of nebulas on the internet and wonder at it all.
For example, I’m a fan of millisecond pulsars. A gigantic star, millions of light years away, explodes in a huge supernova. It creates a fireball ten million billion billion times bigger than Hiroshima. In its ashes, it leaves behind a neutron star made of dense atomic nuclei, squashed together at a density 10 trillion times greater than steel. A teaspoon full of neutron star weighs about the same as Sydney Harbour. Sometimes this neutron star will steal stuff from a nearby star and start spinning. Some neutron stars spin hundreds of times a second—a whole star rotating as fast as an idling car engine. Many of these super-dense, revving stars send out pulses of electromagnetic radiation, milliseconds apart. And we might be able to use these millisecond pulsars as standard cosmological clocks to help us detect gravitational waves, explore space-time bending, and understand more about the tiniest particles in the universe.
But apart from the wow factor, what’s the point of learning about space?
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