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August 20, 2025, 01:45 PM - 8 min read
Is our universe perfectly flat or does it have curvature to it like a sphere, or flare outwards like a horse saddle? That depends on how dense the universe is, and mapping galaxy clusters helps us measure the density of a hypothetical force known as dark energy.
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June 11, 2025, 03:05 PM - 7 min read
Scientists realised Einstein’s theory didn’t actually say the universe had to be static; the theory could support an expanding universe as well. Indeed, by using the same mathematical tools provided by Einstein’s theory, scientists created new models that showed the universe was, in fact, dynamic and evolving.
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May 21, 2025, 02:10 PM - 6 min read
Light is electromagnetic radiation: basically, an electric wave and a magnetic wave coupled together and travelling through space-time. It has no mass. That point is critical because the mass of an object, whether a speck of dust or a spaceship, limits the top speed it can travel through space.
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April 3, 2025, 03:32 PM - 6 min read
Though stars may appear like distant glistening pearls in the giant clam of the night sky, have you ever wondered what they sound like?
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March 16, 2025, 02:57 PM - 9 min read
Elsewhere in the Solar System, Earth has one moon, Mars has two, Jupiter has 95, Uranus has 28 and Neptune has 16, for a total of 142 moons. We only need to discover ten more moons around Saturn to give it double the number of all the other planets combined.
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March 15, 2025, 01:10 PM - 6 min read
The planets newly discovered around Barnard’s Star are much too faint to be seen directly, so how were they found? The answer lies in the effect of their gravity on the star. The mutual gravitational attraction keeps the planets in their orbits, but also tugs on the star, moving it in a rhythmic dance that can be detected by sensitive spectrograph instruments.
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March 4, 2025, 02:04 PM - 8 min read
The newest generation of radio telescopes – including the Australian Square Kilometre Array Pathfinder (ASKAP) and MeerKAT, a telescope in South Africa – is revealing incredibly faint cosmic objects, never before seen.
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