It’s in raspberries. It’s in fake tanning lotions. And it’s out there.
Floating in the giant dust cloud G+0.693 – 0.027, right near the galactic core. Aromatic? No. But chemically significant? Very.
Astronomers spotted erythrulose. This isn’t a sign of pale alien civilizations obsessed with SPF and fruit diets. It is something colder, older. Compounds that build life are forming in the freezing dark between stars.
“This is the very first sugar to be detained in interstellar space,” Dr Izaskun Jiménez – Serra said.
She works at the Centre for Astrobiology near Madrid Her point is simple. These sugars are everywhere. Or at least more common than anyone guessed. It makes life on other planets feel less like a miracle. More like chemistry doing its job.
Why does this matter?
Lab tests say simple sugars shouldn’t have formed easily on young Earth. It was too hard. Too hot? Too chaotic? We aren’t sure. But we found them in old meteorites. On asteroid Bennu, too. Sugars coming from space. Plausible. Until now, it was a theory. No one saw them being born.
Jiménez – Serra looked with two Spanish radio telescopes. She expected nothing. Specifically, she looked for three – carbon sugars and found zip. Disappointed, she kept looking.
Then. A signal.
Erythrulose has four carbon atoms.
“To my surprise, I saw the signs.”
Cold? Yes. The cloud is -250 Celsius. Reactions still happen. Glycolaldehyde meets ethylene glycol. Both abundant. Both hanging around on dust grains. They bump into each other. Stick. Become sugar. It’s written up in Nature Astronomy. The mechanics are clear. The implication is loud.
What happens after the sugar forms?
It rains down. Or rides comets. They crash into planets. Clatter. Bury. Mix.
On early Earth, these things helped make RNA. Ribonucleotides. The original genetic blueprint. Before DNA took over as the sturdy library, RNA did the heavy lifting. Connecting genes to proteins. Building life from scratch.
Millions of tonnes. That’s how much erythrulose might have dumped on our planet. During the Late Heavy Bombardment asteroids beat the Earth down. Organic soup poured in from the sky.
“To have suffered this kind of rain… that seems to have been a keystep,” Jiménez – Serra notes.
It feeds the prebiotic soup. It synthesizes biomolecules.
Here’s the weird part though. You buy erythrulose for your tan. It hits dead skin. Reacts with amino acids. Turns brown via the Maillard reaction. Same thing that browns a steak crust. Cosmic sugar making planets ready for life. Making your skin look burnt in summer. The universe loves a good parallel.
Professor Yoshihiro Furukawa from Tohoku University was happy to see this. He found the asteroid sugars himself.
“We have been waiting for an actualdetection like this.”
He admits the gap remains wide. The sugar arrives. The environment takes it. Does it become life? Maybe.
How?
Still unclear. We have the ingredients. The delivery method is proven. The rest?
We are still writing the recipe. 🍓🌌
