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#clipper

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Há algum tempo, usei DOSBox para executar um programa escrito em dBase/Clipper na década de 1990 como passatempo. Deparei-me com o executável, mas o código-fonte ainda está perdido. Fiz um vídeo na ocasião: https://fediverse.tv/w/j7AqtoMbj1FbBz3PC3Bypq

Lembrei agora a época em que a gente "emulava" uma máquina dentro da outra, da mesma arquitetura mesmo, antes da virtualização... 🐢

#TerSoftware #Clipper #DOS #PeerTube

CC: @TagsBR@social.br-linux.org @manualdousuario@mastodon.social
Continued thread

Here is a simulated view of Mars from above the Europa Clipper spacecraft during the slingshot flyby today at 17:55 UTC.

The locations of a few landers and rovers on the Martian surface are shown (hello Perseverance and Curiosity 👋). So are the orbital locations of a few Mars orbiter spacecraft. Jupiter beckons in the far distance.

eyes.nasa.gov/apps/solar-syste
#Mars #Clipper #Europa #Jupiter
2/n

#MasterMe von @trummerschlunk@chaos.social @falktx@mastodon.falktx.com benutze ich seit es das gibt für meine Projekte fast immer. Vielen Dank für dieses #OpenSource Tool!
Manchmal ist aber hinten dran das
#LSP #Clipper noch nötig. Besonders wenn es um Onlineaufnahmen mit suboptimalem Audiokonferenzequipment geht.
So auch bei der Vorbereitung dieser Tagung zur
#Inklusion:
https://bildung.social/@komin/113803547189314869

#Audio #FX #DeBeSSZukunft #DeBeSSTagung

"...perhaps by using carriers' wiretapping capabilities."

With equipment provisioned with #CALEA facilities yet sold into a market where configuration and access control is entirely idiosyncratic and unsystematic, make that a certainty.

Forget the China aspect. Here's a case study of unintended consequences of deference to law enforcement demands.

Remember pro-#CLIPPER PR? "Access only available via court order..."

Warrants are for rule followers-- the exception.

theregister.com/2024/11/25/sal

The Register · China has utterly pwned 'thousands and thousands' of devices at US telcosBy Simon Sharwood
Continued thread

In 2012, NASA initiated a new series of studies to yet again define a Europa mission.

The leading contender that emerged from this process was a spacecraft capable of making multiple flybys of the Jovian moon,
-- and this became known as the #Europa #Clipper.

Scientists realized it was impractical to build an orbiter
-- because the spacecraft would have a short lifetime due to constant exposure to the intense radiation emanating from Jupiter.

By making dozens of flybys, Clipper could swoop into the inner Jovian system, gather data from Europa, and then transmit it back to Earth when the spacecraft was further from Jupiter's harsh radiation environment.

Starting in fiscal year 2013, Culberson began adding money to NASA's budget specifically for the development of a Clipper mission,
even though NASA had not committed to starting a program.

"We're only going to have one chance at this in our lifetimes," he told me that year,
explaining his effort to essentially force NASA to green-light a Europa mission after nearly two decades of dithering.

"We've got one shot. I want to make sure you and I are here to see those first tube worms and lobsters on Europa."

NASA could not afford to ignore Culberson, who was no longer a junior Congressman.

In December 2013, U.S. Rep. Frank Wolf, a Virginia Republican, said he would not run for re-election in 2014,
leaving Culberson as the odds-on favorite to replace him as chairman of an appropriations subcommittee that oversees NASA.

Effectively, this gave Culberson control over the agency's purse strings.

In January 2015, that happened.

Now chairman of the all-important budget subcommittee,
Culberson began making periodic trips to the Jet Propulsion Laboratory in California.

To the mortification of NASA's senior leaders and communications officials,
Culberson decided to invite me to come along for sessions that would last a day or two.

There were no restrictions.

I got to sit in on all the meetings, hear the discussions, and even participate at times.

Even better, at Culberson's insistence, it was all on the record.

Let me explain how rare an opportunity this is.

Typically, journalists learn about space exploration by interviewing sources, attending press conferences, and reading scientific papers.

But to be in the room where it happened?
-- That just does not happen.

But Culberson was inviting me behind the curtain into detailed discussions where the mission planners and leadership at the NASA facility in California explained what they were doing,
why they were doing it,
-- and where they needed political help.

It was eye-opening for me to see how these kinds of missions got done and see power in action.

Continued thread

It all began decades ago

After the two Voyager flybys in 1979, NASA sent a dedicated probe named #Galileo to Jupiter in the 1990s.

This spacecraft made several passes by #Europa during its nearly eight years in orbit around Jupiter, and data from this mission indicated the likely presence of a water ocean beneath the moon's icy surface.

In the nearly three decades since then, planetary scientists have had little more to go on than these tantalizing clues.

They've desperately wanted to know more.

Almost immediately after the first Europa data from Galileo beamed back to Earth in 1996, the administrator of NASA at the time,
#Dan #Goldin,
asked scientists at the agency's Jet Propulsion Laboratory in California whether a small mission dedicated to the study of Europa was possible.

Fitting within Goldin's ethos of
"faster, better, and cheaper,"
he wanted a design for a spacecraft carrying just 27 kg of scientific instruments to Europa,
about the same mass as a suitcase than can be checked on to an airplane.

"That was the beginning of a Europa orbiter concept," said science writer David Brown, author of
"The Mission", which tells the definitive story of the Europa Clipper mission.

The original science objectives outlined during the development of this orbiter mission
—to investigate the composition of Europa’s ice shell and ocean, the world's geology, and to search for and characterize any plumes emanating from the ocean below
—remain more or less the same with #Clipper.

However, as often happens with deep space missions, the budget doubled.

NASA's chief of science at the turn of the century, astrophysicist Ed Weiler, killed the nascent Europa program.

But scientists were still interested.

In 2003, the National Research Council published its first "decadal survey,"
a process by which the scientific community outlines research priorities for NASA.

Over the years, these decadal surveys have become influential tools for guiding NASA policy.

In this first survey, scientists recommended that NASA establish a "large-class" mission to study #Europa

NASA is poised to launch #Europa #Clipper, a $5.2 billion mission to Jupiter’s fourth-largest moon, as early as October 10.

The spacecraft will blast off from Kennedy Space Center in Florida atop a SpaceX Falcon Heavy rocket.

It will study Europa, a possible home for extraterrestrial life, through a series of flybys after reaching Jupiter in 2030. 

Europa isn’t a craterous rock like our moon.
Its surface is coated with ice, and telescope and spacecraft observations suggest it harbors a colossal #liquid #ocean in its interior that holds 🔸twice as much water as all of Earth’s oceans combined.
Europa also possesses some of
🔸life’s critical building blocks: carbon, oxygen, hydrogen, nitrogen, phosphorus, and sulfur.
These conditions could be sufficient for life to have developed there, either in the depths of the ocean or in subsurface lakes. 
Europa Clipper isn’t on the hunt for extraterrestrial life, however. Instead, its team hopes to assess the moon’s habitability
—how well it could support life.
The probe will use its range of scientific instruments, including cameras, spectrometers, magnetometers, and radars, to collect chemical, physical, and geological data in a series of flybys.
Promising results could justify a mission to land on Europa and search for life. 
On September 9, Europa Clipper passed a milestone review called Key Decision Point E, approving it to proceed for launch. 
After arriving in orbit around Jupiter, Europa Clipper will conduct 49 close flybys of Europa.
At its closest, the spacecraft will come within 16 miles (26 kilometers) of the surface for detailed observations. 

technologyreview.com/2024/02/1

MIT Technology Review · The search for extraterrestrial life is targeting Jupiter’s icy moon EuropaBy Stephen Ornes

We've known of #Europa’s existence for more than four centuries,
but for most of that time, #Jupiter’s fourth-largest #moon was just a pinprick of light in our telescopes
—a bright and curious companion to the solar system’s resident giant.
Over the last few decades, however, as astronomers have scrutinized it through telescopes and six spacecraft have flown nearby, a new picture has come into focus.
Europa is nothing like our moon. 
Observations suggest that its heart is a ball of #metal and #rock, surrounded by a vast #saltwater #ocean that contains 🌟more than twice as much water as is found on Earth. 🌟
That massive sea is encased in a smooth but fractured blanket of cracked #ice, one that seems to occasionally break open and spew watery plumes into the moon’s thin atmosphere. 

For these reasons, Europa has captivated planetary scientists interested in the geophysics of alien worlds.
All that water and energy
—and hints of elements essential for building organic molecules
—point to another extraordinary possibility.
In the depths of its ocean, or perhaps crowded in subsurface lakes or below icy surface vents, Jupiter’s big, bright moon could host #life
“We think there’s an ocean there, everywhere,” says Bob Pappalardo, a planetary scientist at NASA’s Jet Propulsion Laboratory in Pasadena, California.
“Essentially 💥everywhere on Earth that there’s water, there’s life. 💥Could there be life on Europa?” 
Pappalardo has been at the forefront of efforts to send a craft to Europa for more than two decades.
Now his hope is finally coming to fruition:
later this year, NASA plans to launch #Europa #Clipper, the largest-­ever craft designed to visit another planet.
The $5 billion mission, scheduled to reach Jupiter in 2030, will spend four years analyzing this moon to determine whether it could support life.
It will be joined after two years by the European Space Agency’s #Juice, which launched last year and is similarly designed to look for habitable conditions, not only on Europa but also on other mysterious Jovian moons

technologyreview.com/2024/02/1

MIT Technology Review · The search for extraterrestrial life is targeting Jupiter’s icy moon EuropaBy Stephen Ornes