Hubble captured the planet's reflected visible light and highlighted Saturn's iconic yellow hues, which are, in part, a product of the sunlight-reflecting ammonia crystals and hydrocarbons such as methane in its atmosphere.
Could IT infrastructure, and even the rise of AI, eventually migrate beyond the atmosphere? Amazon founder Jeff Bezos predicted in October that gigawatt-scale, solar-powered data centers would be a reality within 10 to 20 years. At the World Economic Forum in Davos this week, Elon Musk was even more ambitious: AI data centers in the "final frontier" could be viable within two to three years. Google also plans to deploy its TPU chips in orbit via Project Suncatcher.
In the silent vacuum of space, five autonomous robots churn through the lunar surface, digging up a loose layer of rock and dust and leaving rows of uniform tracks in their wake. Stopping only to recharge at a central solar power station, the car-sized machines process the lunar dirt internally to extract a type of helium so rare on Earth that a palm-sized container is estimated to be worth millions.
The new work was less notable for showing that we had found these bases in Ryugu than for solving a previous mystery: earlier studies had failed to detect them there, despite their presence in many other asteroid samples.
Discovered in December 2024, asteroid 2024 YR4 was briefly considered the most dangerous asteroid in decades after scientists initially estimated it had a 3.1% chance of colliding with the Earth in 2032. Closer observations quickly ruled out a city killer scenario, but instead astronomers calculated there was a 4.3% chance that the moon lay in the path of impact.
Plenty of asteroids can survive their fiery plunge through the Earth's atmosphere. If they're big enough, they can prove incredibly destructive, like the 60-foot Chelyabinsk meteor that exploded over the southern Ural region in Russia in 2013, releasing a blast equivalent to 30 times the energy of the atomic bomb that was dropped on Hiroshima. And in case an even larger space rock were to ever threaten humanity, we'd have to get creative to keep it from colliding with our planet.
We found that life is more likely to survive an asteroid impact, so it's definitely still a real possibility that life on Earth could have come from Mars. Maybe we're Martians! The idea that life could have spread through the solar system or even the universe on rocks is known as the lithopanspermia hypothesis.
Now say you want to run some modest AI stuff. That's a bigger job, so let's scale up our cubical computer with edges twice as long as before. That would make the volume eight times larger (2 3), so we could have eight times as many processors, and we need eight times as much power input-2,400 watts. However, the surface area is only four times (2 2) larger, so the radiative power would be about 4,000 watts.
In all the known Universe, at least as of 2026, the only world known to support life is planet Earth. Despite all we've learned about the Universe, including: the vast abundance of exoplanets, including rocky exoplanets with Earth-like temperatures, the ubiquity of heavy elements, the commonness of organic molecules that are known precursors to life, and the long cosmic timescales over which stars with such planets form, there are no known examples of worlds, other than our own, where life processes or definitive biosignatures have been detected.