Technologies

Astronomers search for alien tech among billions of stars but come up empty

It’s all quiet in the galactic center.

Using one of the world’s most sensitive radio telescopes, a trio of Australian researchers has gone alien hunting in the heart of the Milky Way. In late 2020, they pointed their ears toward the galactic center, listening for alien technosignatures. In their field of view lay 144 known exoplanets and, potentially, billions of stars.

But after keeping their ears to the sky for more than seven hours, they didn’t hear anything plausibly alien. It seems awfully quiet out there.

The search was conducted by the Murchison Widefield Array, a collection of 4,096 spider-like antennas planted in the Western Australian desert. The antennas, arranged in 256 tiles, can pick up low-frequency radio waves from space. Importantly, the array has a wide field of view, which means researchers can listen out for technosignatures — signals broadcast by intelligent life — across a huge region of space. «We are looking for long sustained signals or technological leakages from the inhabitants daily lives,» says Chenoa Tremblay, a researcher with the SETI Institute in California.

The search is described in a new paper, which appeared Monday on preprint repository arXiv (PDF) and has been accepted for publication in the journal Publications of the Astronomical Society of Australia.

This isn’t the first time the team has used MWA to hunt for alien signals, either. They previously examined the dark forest of our cosmos back in 2020 using the MWA, analyzing over 10 million stars, studied the galactic center back in 2013 and performed a search toward the Orion nebula in 2018. They didn’t hear boo from any aliens in those three surveys, either.

However, the new search is different in a few keys ways, according to Tremblay, who is also first author of the new study. The previous search of the galactic center, in 2013, only contained 38 known exoplanets whereas the new search contained 144. «This is our largest population of known exoplanets within our four surveys with the MWA,» Tremblay says.

Hunting for life around the galactic center is particularly useful because the region contains the highest density of stars within our galaxy. Where there are stars, there may be planets and where they are planets… well, you get the drift. «[M]odelling and our large catalogue of known solar systems suggest that there are high chances of habitable planets toward the Galactic centre,» Tremblay notes.

The amount of stars in the new search is difficult to accurately predict because the galactic center is mighty dusty, obscuring the view of surveys and preventing an accurate read. Previous searches have used data from the Gaia Space Observatory to count the amount of stars but that doesn’t work in the galactic center. Tremblay explains that the team used a different survey, known as Galactic Nucleus, which classified 3.3 million stars. However, the survey covers less than 1% of the area surveyed by MWA.

«If we extrapolate this, we are covering billions of stellar systems out to the centre of our Galaxy,» Tremblay notes.

That’s, in theory, a lot of chances to hear from extraterrestrial friends. However, it’s still just a mere drop in the cosmic ocean — there’s plenty of other places alien technosignatures could be emanating from.

It was also the first time a search has been conducted at a high frequency of 155 MHz. This reduced the chance of picking up daily Earth communications and interference. Previous searches focused on lower frequencies between 98 and 133MHz. Of course, that comes with a big caveat: We’re kind of assuming these alien technologies are using the same technologies to broadcast as we are.

The MWA is currently undergoing an upgrade that will allow searches at different frequencies and time resolution, giving it the ability to match other searches for technosignatures like those conducted by the Breakthrough Listen collective. Tremblay notes that all 256 of the tiles containing the spider-like antennas will be able to image the sky when the upgrades are complete.

Technologies

Today’s NYT Connections Hints, Answers and Help for April 6, #665

Find hints and answers for the New York Times’ Connections puzzle for Sunday, April 6.

Looking for the most recent Connections answers? Click here for today’s Connections hints, as well as our daily answers and hints for The New York Times Mini Crossword, Wordle, Connections: Sports Edition and Strands puzzles.

Today’s Connections puzzle was a challenging one. The yellow and green categories were pretty easy, but I struggled with blue and purple. Read on for clues and today’s Connections answers.

The Times now has a Connections Bot, like the one for Wordle. Go there after you play to receive a numeric score and to have the program analyze your answers. Players who are registered with the Times Games section can now nerd out by following their progress, including number of puzzles completed, win rate, number of times they nabbed a perfect score and their win streak.

Read more: Hints, Tips and Strategies to Help You Win at NYT Connections Every Time

Hints for today’s Connections groups

Here are four hints for the groupings in today’s Connections puzzle, ranked from the easiest yellow group, to the tough (and sometimes bizarre) purple group.

Yellow group hint: We’re not close.

Green group hint: Pay the bills.

Blue group hint: Don’t get a shock!

Purple group hint: Think 420.

Answers for today’s Connections groups

Yellow group: Aloof.

Green group: Utilities.

Blue group: What an electrometer measures.

Purple group: ____ joint.

Read more: Wordle Cheat Sheet: Here Are the Most Popular Letters Used in English Words

What are today’s Connections answers?

The yellow words in today’s Connections

The theme is aloof. The four answers are cool, distant, remote and removed.

The green words in today’s Connections

The theme is utilities. The four answers are cable, gas, trash and water.

The blue words in today’s Connections

The theme is what an eletrometer measures. The four answers are charge, current, resistance and voltage.

The purple words in today’s Connections

The theme is ____ joint. The four answers are dovetail, hip, pizza and Spike Lee.

Technologies

Today’s NYT Connections: Sports Edition Hints and Answers for April 6, #195

Hints and answers for the NYT Connections: Sports Edition puzzle, No. 195, for Sunday, April 6.

Looking for the most recent regular Connections answers? Click here for today’s Connections hints, as well as our daily answers and hints for The New York Times Mini Crossword, Wordle and Strands puzzles.

Is it just me, or is Connections: Sports Edition getting tougher each week? Or am I getting dumber? Fight fans, you might do all right today, but there was one compound word in your category (green) that I literally have never heard before. Read on for hints and the answers.

Connections: Sports Edition is out of beta now, making its debut on Super Bowl Sunday, Feb. 9. That’s a sign that the game has earned enough loyal players that The Athletic, the subscription-based sports journalism site owned by the Times, will continue to publish it. It doesn’t show up in the NYT Games app but now appears in The Athletic’s own app. Or you can continue to play it free online.

Read more: NYT Connections: Sports Edition Puzzle Comes Out of Beta

Hints for today’s Connections: Sports Edition groups

Here are four hints for the groupings in today’s Connections: Sports Edition puzzle, ranked from the easiest yellow group to the tough (and sometimes bizarre) purple group.

Yellow group hint: Get out of here.

Green group hint: It happens in the octagon.

Blue group hint: They call it football.

Purple group hint: Not on…

Answers for today’s Connections: Sports Edition groups

Yellow group: Part ways.

Green group: MMA terms.

Blue group: English soccer clubs.

Purple group: ____ off.

Read more: Wordle Cheat Sheet: Here Are the Most Popular Letters Used in English Words

What are today’s Connections: Sports Edition answers?

The yellow words in today’s Connections

The theme is part ways. The four answers are dismiss, fire, oust and sack.

The green words in today’s Connections

The theme is MMA terms. The four answers are armbar, choke, clinch and submission.

The blue words in today’s Connections

The theme is English soccer clubs. The four answers are Burnley, Leeds, Stoke and Watford.

The purple words in today’s Connections

The theme is ____ off. The four answers are face, lead, tip and walk.

Technologies

Bill Gates Has Published the Original Microsoft Source Code

It’s «the coolest code I’ve ever written,» the Microsoft co-founder says.

If you want to see the original source code that started Microsoft, Bill Gates is now sharing it. On Wednesday, the Microsoft co-founder posted it on his Gates Notes blog, reminiscing about the company’s early days for its 50th anniversary. Gates has written plenty of code in those five decades but he called this «the coolest code I’ve ever written.»

Sharing a photo of himself holding a huge pile of paper showing the code, Gates wrote that he was inspired by the January 1975 copy of Popular Electronics magazine. The magazine had featured a cover photo of an Altair 8800, a groundbreaking personal computer created by a small company called MITS.

The 19-year-old Gates and his Harvard pal Paul Allen reached out to Altair’s creators and told them they had a version of the programming language BASIC for the chip that the Altair 8800 ran on. Such software would let people program the Altair.

«There was just one problem,» Gates wrote. «We didn’t.»

Micro-Soft is born

Gates said he and friends «coded day and night for two months to create the software we said already existed.» Gates and Allen then presented the code to the president of MITS, who agreed to license the software. «Altair BASIC became the first product of our new company, which we decided to call Micro-Soft,» Gates wrote. «We later dropped the hyphen.»

And the rest, as they say, is software history. You can download that 50-year-old code from Gates’s post. «Computer programming has come a long way over the last 50 years, but I’m still super proud of how it turned out,» he wrote.

Read more: Best 16 Xbox Games Right Now

Melinda Gates: new book

Also making headlines this week was Gates’s former wife, Melinda French Gates, whose new book, The Next Day, comes out April 15. As that date approaches, she’s opening up about the end of her marriage to Gates.

The couple divorced in 2021 after 27 years and three children. According to People magazine, Melinda French Gates wrote in the book that in 2019 she was «having nightmares about a beautiful house collapsing all around her — and then waking up in a panic night after night.»

She acknowledged what Bill Gates has publicly stated — that he wasn’t always faithful in the marriage — and said she was also disturbed by Gates’s meetings with child sex offender Jeffrey Epstein. Bill Gates has since said he regrets meeting Epstein.

Melinda French Gates said her bad dreams would eventually change into images of her family on the edge of a cliff where she «plummeted» into a void. «I knew, in that moment, that I was going to have to make a decision — and that I was going to have to make it by myself,» she wrote, according to the People article.