Monday, 22 June 2026

NASA Shuts Off Instrument on Voyager 1 to Keep Spacecraft Operating.

 

On April 17, engineers at NASA’s Jet Propulsion Laboratory (JPL) in Southern California sent commands to shut down an instrument aboard Voyager 1 called the Low-energy Charged Particles experiment, or LECP. The nuclear-powered spacecraft is running low on power, and turning off the LECP is considered the best way to keep humanity’s first interstellar explorer going.

An artist’s concept of a Voyager spacecraft silhouetted against a vibrant purple and teal nebula.
Mission engineers at NASA’s Jet Propulsion Laboratory in Southern California turned off the Low-energy Charged Particles experiment aboard Voyager 1 on April 17, 2026.
NASA/JPL-Caltech

The LECP has been operating almost without interruption since Voyager 1 launched in 1977 — almost 49 years. It measures low-energy charged particles, including ions, electrons, and cosmic rays originating from our solar system and galaxy. The instrument has provided critical data about the structure of the interstellar medium, detecting pressure fronts and regions of varying particle density in the space beyond our heliosphere. The twin Voyagers are the only spacecraft that are far enough from Earth to provide this information.

Like Voyager 2, Voyager 1 relies on a radioisotope thermoelectric generator, a device that converts heat from decaying plutonium into electricity. Both probes lose about 4 watts of power each year. After almost a half-century in space, power margins have grown razor thin, requiring the team to conserve energy by shutting off heaters and instruments while making sure the spacecraft don’t get so cold that their fuel lines freeze.

During a routine, planned roll maneuver on Feb. 27, Voyager 1’s power levels fell unexpectedly. Mission engineers knew any additional drop in power could trigger the spacecraft’s undervoltage fault protection system, which would shut down components on its own to safeguard the probe, requiring recovery by the flight team — a lengthy process that carries its own risks.

The Voyager team needed to act first.

“While shutting down a science instrument is not anybody’s preference, it is the best option available,” said Kareem Badaruddin, Voyager mission manager at JPL. “Voyager 1 still has two remaining operating science instruments — one that listens to plasma waves and one that measures magnetic fields. They are still working great, sending back data from a region of space no other human-made craft has ever explored. The team remains focused on keeping both Voyagers going for as long as possible.”

Far-out plan

The choice of which instrument to turn off next wasn’t made in the heat of the moment. Years ago, the Voyager science and engineering teams sat down together and agreed on the order in which they would shut off parts of the spacecraft while ensuring the mission can continue to conduct its unique science. Of the 10 identical sets of instruments that each spacecraft carries, seven have been shut off so far. For Voyager 1, the LECP was next on that list. The team shut off the LECP on Voyager 2 in March 2025.

Because Voyager 1 is more than 15 billion miles (25 billion kilometers) from Earth, the sequence of commands to shut down the instrument will take 23 or so hours to reach the spacecraft, and the shutdown process itself will take about three hours and 15 minutes to complete. One part of the LECP — a small motor that spins the sensor in a circle to scan in all directions — will remain on. It uses little power (0.5 watts), and keeping it running gives the team the best chance of being able to turn the instrument back on someday if they find extra power.

What comes next

Engineers are confident that shutting down the LECP will give Voyager 1 about a year of breathing room. They are using the time to finalize a more ambitious energy-saving fix for both Voyagers they call “the Big Bang,” which is designed to further extend Voyager operations. The idea is to swap out a group of powered devices all at once — hence the nickname — turning some things off and replacing them with lower-power alternatives to keep the spacecraft warm enough to continue gathering science data.

The team will implement the Big Bang on Voyager 2 first, which has a little more power to spare and is closer to Earth, making it the safer test subject. Tests are planned for May and June 2026. If they go well, the team will attempt the same fix on Voyager 1 no sooner than July. If it works, there is even a chance that Voyager 1’s LECP could be switched back on.

DC Agle / Calla Cofield
Jet Propulsion Laboratory, Pasadena, Calif.
818-354-5011 / 626-808-2469
agle@jpl.nasa.gov / calla.e.cofield@jpl.nasa.gov

France on 'red alert' as temperatures hit 40C in Europe heatwave.

 Extract from ABC News

A woman holds a hand fan over her head in front of the Eiffel Tower.

Half of France is placed under a red alert advisory as temperatures across the country soar. (Reuters: Sarah Meyssonnier)

In short:

Multiple countries across Europe are issuing warnings as a fresh heatwave bakes the continent.

There have been reports of drownings in France, Germany and Italy as residents flock to waterways to cool off. 

Scientists say human-induced climate change is making heatwaves more extreme and more common.

Sunday, 21 June 2026

Al Jazeera cameraman Ahmed Wishah killed in Israeli air strike on Gaza.

 Extract from ABC News

A man filing with a phone on a tripod, turning back to look at the camera

Al Jazeera cameraman Ahmed Wishah died two months after his brother Mohammed, also a correspondent for the network, was himself killed in Gaza. (Supplied: Al Jazeera)

In short: 

An Al Jazeera cameraman has been killed in an Israeli strike in Gaza, two months after his brother and colleague was also killed.

The Qatar-based news network condemned the "deliberate killing", while an Israeli military spokesman claimed Wishah was a Hamas terrorist.

Gaza health officials said Israeli strikes on Saturday, local time, killed at least 11 people, including two children.

Saturday, 20 June 2026

The Tassie devils in my neighbourhood keep stealing shoes and laundry, but I adore them.

Extract from The Guardian

A Tasmanian devil joey being bottle fed

The thievery of these little creatures is endlessly amusing to me, but there have been, I’m told, a few rounds of inconvenience.

The thing is, I’m fortunate to live in that lush green valley, but my neighbours are inveterate kleptomaniacs. A guest who was visiting for the Cygnet folk festival this summer had left some laundry out on my landlady’s deck to dry in the sun, and as my landlady turned the corner, she saw the pair of knickers disappearing slowly between the wooden deck slats. She dived to rescue the knickers; the thief scuttled away beneath the deck. I learned early on that leaving shoes out at night was to kiss your shoes goodbye.

(And in the day, the landlady’s dog will steal your shoes, so they aren’t safe day or night.)

The thing is, I adore my neighbours. Tassie devils have a penchant for non-compliance and their preferred method of communication is bloodcurdling screams. Now that I’m in my 40s, I can relate.

Sarcophilus harrisii, or “Harris’s flesh-lover”, are the world’s largest carnivorous marsupial, and they bear zero resemblance to Taz, the spinning tornado of a cartoon I grew up watching.

As a person who was born in North America, my nearest mental image is “small bear”, in the way the body moves – somewhat lumbering and by all appearances not very flexible. A pit bull may be more accurate to imagine the size and strength of these little creatures, but their jaw strength, as I learned recently at the Tasmanian Devil Unzoo, is that of four pit bulls. And they lumber, or bound, because their heads are so heavy that their hind legs have evolved to be short: they are top-heavy, and would simply fall on their faces if the hind end didn’t compensate.

It was moderately hopeful to learn that, though the populations of devils have been decimated by facial tumour disease, there are protected populations on both the Tasman Peninsula and Maria Island: each of these populations, while small, are free of the disease, and there is thought to be enough genetic variation to keep these populations healthy. However, despite conservation gains, they are still classified as endangered.

Last year, it was a delight to peek out from my tiny house window and see a young devil right in the driveway. It was dusk, and the little creature was young and fearless enough to pause before it dived beneath the deck. It was cute as a puppy, but I wouldn’t try to get closer than that, because I value my hands, and their bite force can amputate bone.

Upon first landing in Tasmania, I remember reading an oldish novel where the terrifying monster in the basement was a Tasmanian devil, and now that I’ve seen them, I think the author had probably never been to this island, because the creature in the darkness was far larger and more terrifying than these little imps. Imp is actually the name for a young devil. Accurate.

The thievery of these little creatures is endlessly amusing to me, but there have been, I’m told, a few rounds of inconvenience. Expensive hiking boots have had to be hauled out from beneath the house with a boat hook: with them came cushions from deck chairs that had come from neighbours down the road, and linens that could have made up a picnic.

I once read that devils had stolen something like 40 polar fleeces on Maria Island and stashed them in a great nest beneath the old Penitentiary buildings, but now I can’t find that story and wonder if I’ve made it up – or perhaps someone else did. Headlines say “stealing chocolate”, “stealing dog toys” and “stealing hiking boots”.

Only a few weeks ago, as I was heading into my house after dark, a rumble came from the hedge, about a metre away. If you’ve ever had the frustrated joy of starting up a small lawn mower, the kind where you have to yank a handle on a string, where it goes ruMMM-Rumm, before it actually catches and starts up: that was the song of the critter in the hedge. One of the Unzoo keepers suggested it may have been a quoll rather than a devil. It is a busy hedge, and as my landlady graciously says of this hill: “We are but the latest inhabitants.”

Kelley Swain works in the field of medical and health humanities. She is a PhD candidate at the University of Tasmania, working on a project about poetry and motherhood

Ukraine's upgraded long-range drones a mounting headache for Moscow.

Extract from ABC News

By Annika Burgess

A fuel storage lid flies off after a Ukrainian drone strike on a Moscow refinery.

Trump's limited capacity to sway Israel spells trouble for the Middle East.

Extract from ABC News

Analysis

By Laura Tingle

Donald Trump stands behind a mic talking while gesturing hands.

What has been revealed is the glaring gap between reality and the deluded mindset in the Trump administration that believes it is not only in control of Israel, but the wider world. (Reuters: Evelyn Hockstein)