Articles by Jonathan O'Callaghan, Contributor

Jonathan O’Callaghan is a freelance space and science journalist based in the UK, regularly writing and reporting for a number of publications around the world. He specialises in covering commercial spaceflight, space exploration, and astrophysics, but also reports across a wide range of science, from CRISPR to climate change.

Articles by: Jonathan O'Callaghan

Graphic showing three people riding camels under a starlit sky with one very bright star.

What was the Star of Bethlehem?

By Jonathan O'Callaghan last updated 23 December 22

Reference The Star of Bethlehem led the three wise men to Jesus' birth, according to the New Testament. But what was the Star of Bethlehem? There are several theories.

an abstract view of a wormhole with a clock overlaid

How does time work?

By Jonathan O'Callaghan, How It Works magazine last updated 26 August 22

Here's how time works, according to science.

Composite image of Crab Nebula, created by combining data from five telescopes spanning almost the entire breadth of the electromagnetic spectrum

What is the electromagnetic spectrum?

By Jonathan O'Callaghan published 29 October 21

Reference Why the electromagnetic spectrum, and the electromagnetic radiation it describes, is so interesting and useful for scientists and everyday life.

7 solar system worlds where the weather is crazy

By Jonathan O'Callaghan, Daisy Dobrijevic, How It Works magazine published 30 April 21

What's the weather like on other worlds? Expect methane rain, global haboobs and a 10,000-mile-wide hurricane.

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