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Today in science and space

Sometimes it seems that God falls short of our tolerance standards, imagine picking out one planet in the universe for special treatment, what a bigot. God follows with a whole sequence of discriminatory actions: elevating humans above animals, choosing Jews as his people, and one Jew in particular to save the world. No wonder the equality and diversity brigade is outraged by God.

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Ancient Life Caused the Destruction of Mars, Scientists Speculate​

Frank Landymore - Yesterday at 12:13 PM
https://www.msn.com/en-us/news/tech...sedgntp&cvid=70987784c2c74575baa68d7d027cec71
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Methane-producing microbes on Mars may have thrived deep underground billions of years ago, but also may have wiped themselves out, a new study suggests.© Provided by Futurism

Waterworld​

A new study published this week in Nature Astronomy suggests that, if life once existed on Mars billions of years ago, the planet could've been host to subterranean microbes that produced methane as a byproduct, known as methanogenic microbes.

And since methane is a climate driver, the scientists say, those microbes may have irreversibly damaged the Martian atmosphere, wiping themselves out in the process.

Today, the Red Planet is a cold and barren desert, but extensive observation and exploration have long revealed that the planet was once flowing with rivers, lakes, and maybe even oceans — and therefore was once habitable, too.

According to the study, the abundance of hydrogen in the planet's atmosphere could have sustained the existence of methanogenic organisms four billion years ago, right around the time when the Martian climate was best suited for supporting life.

Underground Scene
From there, Regis Ferrière, senior author of the study and professor of evolutionary biology at the University of Arizona, and his team applied several models to predict temperatures at both the surface and in the crust, and how hypothetical ecosystems would've survived within them.

"Our goal was to make a model of the Martian crust with its mix of rock and salty water, let gases from the atmosphere diffuse into the ground, and see whether methanogens could live with that," Ferrière said in a press release.

"And the answer is, generally speaking, yes, these microbes could have made a living in the planet's crust," he added.

Since the surface would have been too cold, Ferrière said, the microbes would have been most comfortable in the "upper few hundreds of meters" of the Martian crust.
 
HangLow said:
And since methane is a climate driver, the scientists say, those microbes may have irreversibly damaged the Martian atmosphere, wiping themselves out in the process.
Click to expand...
You mean that humans may be as dumb as Martian microbes and wipe themselves out by changing the atmosphere?
 
bellhighschool said:
Maybe someone has asked this already: what was the kinetic energy applied in the collision? in joules I presume.
Has there been a validation of of orbit change yet?
Click to expand...
the orbit change has been validated...
their goal was a 75 seconds change but they achieved a 32-minute change...

Oct 11, 2022 RELEASE 22-105
NASA Confirms DART Mission Impact Changed Asteroid’s Motion in Space

Analysishttps://www.nasa.gov/press-release/nasa-confirms-dart-mission-impact-changed-asteroid-s-motion-in-space of data obtained over the past two weeks

by NASA’s Double Asteroid Redirection Test (DART) investigation team shows the spacecraft's kinetic impact with its target asteroid, Dimorphos, successfully altered the asteroid’s orbit. This marks humanity’s first time purposely changing the motion of a celestial object and the first full-scale demonstration of asteroid deflection technology.

For mission success, DART needed to change Dimorphos’ nearly 12-hour orbital period around Didymos by at least 73 seconds. After two weeks of observations, the team revealed a 32-minute change in Dimorphos’ orbital period — more than 25 times longer than the benchmark for success.

Prior to DART’s impact, it took Dimorphos 11 hours and 55 minutes to orbit its larger parent asteroid, Didymos. Since DART’s intentional collision with Dimorphos on Sept. 26, astronomers have been using telescopes on Earth to measure how much that time has changed. Now, the investigation team has confirmed the spacecraft’s impact altered Dimorphos’ orbit around Didymos by 32 minutes, shortening the 11-hour and 55-minute orbit to 11 hours and 23 minutes. This measurement has a margin of uncertainty of approximately plus or minus 2 minutes.

www.nasa.gov

NASA Confirms DART Mission Impact Changed Asteroid’s Motion in Space - NASA

Lee esta nota de prensa en español aquí.
www.nasa.gov www.nasa.gov

2-2_new_liciacube_luke_flyby_anim_big_1sec.gif
 
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bellhighschool said:
Maybe someone has asked this already: what was the kinetic energy applied in the collision? in joules I presume.
Has there been a validation of of orbit change yet?
Click to expand...

The Physics of Smashing a Spacecraft Into an Asteroid​

NASA will soon release the results of its DART mission to find out whether crashing a probe into a space rock can deflect it. Here’s how they'll do the math.

www.wired.com

The Physics of Smashing a Spacecraft Into an Asteroid

NASA will soon release the results of its DART mission to find out whether crashing a probe into a space rock can deflect it. Here’s how they'll do the math.
www.wired.com www.wired.com

I hope this help and welcome aboard...
-Peace
 
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HangLow said:
the orbit change has been validated...
their goal was a 75 seconds change but they achieved a 32-minute change...

Oct 11, 2022 RELEASE 22-105
NASA Confirms DART Mission Impact Changed Asteroid’s Motion in Space

Analysishttps://www.nasa.gov/press-release/nasa-confirms-dart-mission-impact-changed-asteroid-s-motion-in-space of data obtained over the past two weeks

by NASA’s Double Asteroid Redirection Test (DART) investigation team shows the spacecraft's kinetic impact with its target asteroid, Dimorphos, successfully altered the asteroid’s orbit. This marks humanity’s first time purposely changing the motion of a celestial object and the first full-scale demonstration of asteroid deflection technology.

For mission success, DART needed to change Dimorphos’ nearly 12-hour orbital period around Didymos by at least 73 seconds. After two weeks of observations, the team revealed a 32-minute change in Dimorphos’ orbital period — more than 25 times longer than the benchmark for success.

Prior to DART’s impact, it took Dimorphos 11 hours and 55 minutes to orbit its larger parent asteroid, Didymos. Since DART’s intentional collision with Dimorphos on Sept. 26, astronomers have been using telescopes on Earth to measure how much that time has changed. Now, the investigation team has confirmed the spacecraft’s impact altered Dimorphos’ orbit around Didymos by 32 minutes, shortening the 11-hour and 55-minute orbit to 11 hours and 23 minutes. This measurement has a margin of uncertainty of approximately plus or minus 2 minutes.

www.nasa.gov

NASA Confirms DART Mission Impact Changed Asteroid’s Motion in Space - NASA

Lee esta nota de prensa en español aquí.
www.nasa.gov www.nasa.gov

2-2_new_liciacube_luke_flyby_anim_big_1sec.gif
Click to expand...
So this then brings in the billiard ball question. If the kinetic energy is known it has little meaning unless the angle of intersection is known but then none of this makes much sense after the tan (a)=opp/adj which is just rote chit from -- all together now -- "BELL HIGH SCHOOL" trig class.
 
bellhighschool said:
So this then brings in the billiard ball question. If the kinetic energy is known it has little meaning unless the angle of intersection is known but then none of this makes much sense after the tan (a)=opp/adj which is just rote chit from -- all together now -- "BELL HIGH SCHOOL" trig class.
Click to expand...
Billiard balls are elastic collisions. This was highly inelastic, especially against a rubble pile asteroid.
 
bellhighschool said:
So this then brings in the billiard ball question. If the kinetic energy is known it has little meaning unless the angle of intersection is known but then none of this makes much sense after the tan (a)=opp/adj which is just rote chit from -- all together now -- "BELL HIGH SCHOOL" trig class.
Click to expand...
Good Morning to the Great and Powerful "BELL HIGH SCHOOL" trig class...
With those shiny new BIG BRAINS... I am proud and honored to meet you...
-Peace

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bellhighschool said:
Let me ask, can you remember much from 1965? I have no idea why I retained tan and nothing else but girls cup sizes... fun times:)
Click to expand...
I am pretty sure I read A Fall of Moondust by Arthur C Clarke.

I wasn't into girls' cup sizes yet.
 
Ug make hammer said:
The presence on Earth of any element besides Hydrogen is sufficient to disprove "4000 years".
Implying there's something special about lead seems like a red herring to me?
Click to expand...
everyone is not as bright as you...
some people may wonder where "lead" comes from...
-Peace
 
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