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Marcus F

Marcus writes practical STEM guides: quick "I'm bored" fixes, honest robotics kit reviews, telescope-free astronomy, and space facts. No fluff, just what works for genuinely curious kids. He's obsessed with activities that actually deliver.

Saturn Could Float in Water. And There's a Hexagon on Top.

Saturn weighs ninety-five times what Earth weighs, but its density is less than water. If there were a bathtub big enough, Saturn would bob. And at its north pole there is a six-sided storm thirty thousand kilometres across that nobody fully explains.

Mars Has the Biggest Volcano in the Solar System. And Its Moon Rises in the West.

Mars is half the diameter of Earth but holds the biggest volcano in the solar system. Olympus Mons is three times the height of Everest, with a base the size of Italy. Mars's smaller moon, Phobos, orbits so fast it appears to rise in the west, twice a day.

55 Cancri e: The Planet That Could Be a Diamond

Forty light-years away, a planet completes a full year every eighteen hours. Its surface is hot enough to melt iron. As much as a third of its mass may be diamond. 55 Cancri e is the strangest world we've calculated before we've seen, and we still don't quite know what it is.

The Moon Used to Be Closer

The Moon Used to Be Closer

The Moon hasn't always been where it is now. Four billion years ago, our day was six hours long because the Moon was much closer. It's been pulling away ever since, slowly enough you can't see it, but enough that total solar eclipses won't last forever.

Pluto: The World With a Heart

he most famous photograph of Pluto shows a heart. A bright, smooth plain on a darker, cratered face, roughly the size of Texas. Made of frozen nitrogen, it slowly turns over like a lava lamp on a million-year cycle. Nobody had ever seen it until 2015.

What Two Comets Are Leaving Behind

What Two Comets Are Leaving Behind

This week, Earth is walking through the dust of a comet that visited 40 years ago and won't return until 2061. Meanwhile, scientists released the first close-up data on an interstellar comet older than our Sun. Two comets, two timescales, the same week.

Waves Nobody Has Seen and Life Nobody Would Recognise

Waves Nobody Has Seen and Life Nobody Would Recognise

On Titan, a gentle breeze kicks up waves three metres tall that roll in slow motion. On a lava world, hurricane-force winds barely make a ripple. The same week, a new study asks: what if alien life can only be found by the pattern it leaves across many planets at once?