Astronomy

Astronomers have discovered a nearby system of exoplanets with unusually orderly orbits but disordered densities. Five of the six planets circle the star in a rare rhythmic dance called a resonance chain, while their densities are weirdly shuffled.

WASP-107b was already a very weird exoplanet, with the density of cotton candy. On closer inspection, astronomers have now found that its density is even lower than previously thought, defying our current understanding of how gas giants even form.

Astronomers have detected a strange signal coming from neutron stars that could be a new elementary particle. An unexplained excess of X-rays hints at axions, hypothetical “ghost” particles that could solve several long-standing physics puzzles.

The gravitational waves we’ve detected so far have been like tsunamis in the spacetime sea. Now, a 13-year survey of light from pulsars scattered across the galaxy may have revealed the first hints of gentle gravitational wave background signals.

Despite their name, black holes can give off bright flares of light, usually as they shred stars. Most of those are one-off events, but now astronomers have discovered an extragalactic Old Faithful that fires up like clockwork every 114 days.

How many galaxies are there in the observable universe? Not as many as we thought, according to a new study. NASA’s New Horizons probe has measured the blackness of the sky and found that there’s probably “only” a few hundred billion faint galaxies.

Curing cancer is a noble goal, but sometimes scientists just want to give octopuses ecstasy. From medical marvels to wild speculations about time travel, aliens and the end of the universe, New Atlas revisits some of 2020’s strangest science stories.

Space is an incredibly weird place. From extreme exoplanets to stars with strange fates, clues to an old mystery and the beginnings of a brand new one, here are 10 of the weirdest astronomical discoveries that blew our minds this year.

Astronomers have precisely measured the distance to the oldest and farthest known galaxy. Light left GN-z11 around 13.4 billion years ago, when the universe was a cosmic toddler, meaning this galaxy marks the very edge of the observable universe.

NASA has released a collection of 50 stunning Hubble images to celebrate the veteran telescope’s 30th anniversary, which took place earlier this year. The images show 30 cosmic objects, visible to amateur astronomers across the globe.

Planetary nebulae are basically slow-motion explosions in space, expected to expand and then fade over tens of thousands of years. But in an unprecedented show, Hubble has witnessed a nebula fading and shrinking dramatically within just 20 years.

With the mystery of fast radio bursts looking increasingly solved, astronomers need a new cosmic conundrum to ponder. And right on cue, a brand new noodle-scratcher has emerged from the depths of space – meet “odd radio circles,” or ORCs.