Skip to main content

Our nearest exoplanet, Proxima b, could have a large and chilly neighbor

This artist’s impression shows the planet Proxima b orbiting the red dwarf star Proxima Centauri, the closest star to the Solar System. ESO/M. Kornmesser

Our nearest exoplanet discovered so far is Proxima b, which orbits the star Proxima Centauri located 4.2 light-years from Earth. Orbiting a red dwarf, Proxima b sits in the habitable zone, meaning it could host liquid water on its surface, and is roughly the same size as Earth, making it an intriguing target for dreams of planetary colonization. It was previously believed that Proxima b was the only world hosted by Proxima Centauri.

Recommended Videos

But now new evidence suggests that Proxima b might have a neighbor, Proxima c. Announced at the Breakthrough Initiatives conference this week, a team of scientists led by Mario Damasso from the University of Turin, Italy, and Fabio Del Sordo from the University of Crete, Greece, observed Proxima Centauri using the High Accuracy Radial velocity Planet Searcher (HARPS) instrument. HARPS is located in the La Silla Observatory in Chile and was used to investigate the gravitational effects of orbiting planets.

The scientists observed a “wobble” of Proxima Centauri which suggests there could be a second planet in orbit around it. This wobble had been previously observed but was only of borderline significance, but in the last few years a larger dataset has been collected. Analyzing this larger dataset pushed the findings into the territory of significance.

However, Damasso and Sordo were keen to emphasize that this is only a preliminary finding. “It is only a candidate,” Damasso said during the presentation, according to Scientific American. “This is very important to underline.”

Proxima c, if it does exist, is estimated to be a super-Earth with a mass about six times that of our planet. It would orbit its star every 1900 days at 1.5 times the distance between the Earth and the Sun, meaning it is a cold and inhospitable place. This is because, as a red dwarf, Proxima Centauri is smaller and dimmer than our Sun. So its rays would barely reach Proxima c enough to heat it, making the surface temperature low.

So don’t plan a colonization trip just yet. But there could be another exoplanet nearby that we could one day visit.

Georgina Torbet
Georgina has been the space writer at Digital Trends space writer for six years, covering human space exploration, planetary…
Rivian set to unlock unmapped roads for Gen2 vehicles
rivian unmapped roads gen2 r1t gallery image 0

Rivian fans rejoice! Just a few weeks ago, Rivian rolled out automated, hands-off driving for its second-gen R1 vehicles with a game-changing software update. Yet, the new feature, which is only operational on mapped highways, had left many fans craving for more.
Now the company, which prides itself on listening to - and delivering on - what its customers want, didn’t wait long to signal a ‘map-free’ upgrade will be available later this year.
“One feedback we’ve heard loud and clear is that customers love [Highway Assist] but they want to use it in more places,” James Philbin, Rivian VP of autonomy, said on the podcast RivianTrackr Hangouts. “So that’s something kind of exciting we’re working on, we’re calling it internally ‘Map Free’, that we’re targeting for later this year.”
The lag between the release of Highway Assist (HWA) and Map Free automated driving gives time for the fleet of Rivian vehicles to gather ‘unique events’. These events are used to train Rivian’s offline model in the cloud before data is distilled back to individual vehicles.
As Rivian founder and CEO RJ Scaringe explained in early March, HWA marked the very beginning of an expanding automated-driving feature set, “going from highways to surface roads, to turn-by-turn.”
For now, HWA still requires drivers to keep their eyes on the road. The system will send alerts if you drift too long without paying attention. But stay tuned—eyes-off driving is set for 2026.
It’s also part of what Rivian calls its “Giving you your time back” philosophy, the first of three pillars supporting Rivian’s vision over the next three to five years. Philbin says that philosophy is focused on “meeting drivers where they are”, as opposed to chasing full automation in the way other automakers, such as Tesla’s robotaxi, might be doing.
“We recognize a lot of people buy Rivians to go on these adventures, to have these amazing trips. They want to drive, and we want to let them drive,” Philbin says. “But there’s a lot of other driving that’s very monotonous, very boring, like on the highway. There, giving you your time back is how we can give the best experience.”
This will also eventually lead to the third pillar of Rivian’s vision, which is delivering Level 4, or high-automation vehicles: Those will offer features such as auto park or auto valet, where you can get out of your Rivian at the office, or at the airport, and it goes off and parks itself.
While not promising anything, Philbin says he believes the current Gen 2 hardware and platforms should be able to support these upcoming features.
The second pillar for Rivian is its focus on active safety features, as the EV-maker rewrote its entire autonomous vehicle (AV) system for its Gen2 models. This focus allowed Rivian’s R1T to be the only large truck in North America to get a Top Safety Pick+ from the Insurance Institute for Highway Safety.
“I believe there’s a lot of innovation in the active safety space, in terms of making those features more capable and preventing more accidents,” Philbin says. “Really the goal, the north star goal, would be to have Rivian be one of the safest vehicles on the road, not only for the occupants but also for other road users.”

Read more
Jaguar Land Rover, Nissan hit the brake on shipments to U.S. over tariffs
Range Rover Sport P400e

Jaguar Land Rover (JLR) has announced it will pause shipments of its UK-made cars to the United States this month, while it figures out how to respond to President Donald Trump's 25% tariff on imported cars.

"As we work to address the new trading terms with our business partners, we are taking some short-term actions, including a shipment pause in April, as we develop our mid- to longer-term plans," JLR said in a statement sent to various media.

Read more
DeepSeek readies the next AI disruption with self-improving models
DeepSeek AI chatbot running on an iPhone.

Barely a few months ago, Wall Street’s big bet on generative AI had a moment of reckoning when DeepSeek arrived on the scene. Despite its heavily censored nature, the open source DeepSeek proved that a frontier reasoning AI model doesn’t necessarily require billions of dollars and can be pulled off on modest resources.

It quickly found commercial adoption by giants such as Huawei, Oppo, and Vivo, while the likes of Microsoft, Alibaba, and Tencent quickly gave it a spot on their platforms. Now, the buzzy Chinese company’s next target is self-improving AI models that use a looping judge-reward approach to improve themselves.

Read more