November 24, 2021
twitter.com/nasa/status/1463315612042678279
Technically, the two asteroids the DART is aiming at are a “binary” (they orbit each other).
The BBC’s explanation is pretty good.
They don’t even mention Bruce Willis until the final sentence.
November 12, 2021
Hang on, I think I’ve seen this before…
Oh.
Not such a great idea, then, to send them on an interstellar cruise…
October 6, 2021
Over the years, the SAA has been responsible for several spacecraft failures and even dictates when astronauts can and can’t perform spacewalks. As the space around Earth becomes filled with an increasing number of craft, what does the SAA mean for the future of spaceflight?
https://astronomy.com/news/2021/02/hidden-spaceflight-danger-the-south-atlantic-anomaly?utm_source=asyfb&utm_medium=social&utm_campaign=asyfb&fbclid=IwAR1LeNgz7Eynvjw3_AmU232xwz9WbJpSMOmid7NTEE9qm4VxYpdcNmVDc8Q
This post is from back in February 2021, but I just stumbled across it this morning and thought it was an interesting read.
Learn something new every day!
This part caught my eye…
Radiation is a colorless, tasteless, and odorless enemy…
…and I couldn’t help thinking…
Iocaine powder?!?
It’s okay. I’m immune 😂
Anyway, the article linked above is food for thought. Whenever electronic objects pass through the SAA, which is where the loops of the Van Allen Belt dip perilously close to the Earth, the electronics get a massive amount of radiation and go haywire.
Seriously expensive to shield stuff up there — and as more and more satellites (and people) go up, so does the risk.
September 18, 2021
The blood, sweat, and tears of pioneering astronauts could literally turn Mars regolith into building materials.
First, however, they’d need to get the 3D printers there…
July 31, 2021
…while light cannot escape a black hole, its extreme gravity warps space around it, which allows light to “echo,” bending around the back of the object. Thanks to this strange phenomenon, astronomers have, for the first time, observed the light from behind a black hole.
https://www.nbcnews.com/science/space/einstein-right-researchers-see-light-echo-black-hole-rcna1553
Einstein has been proven right. Again.
July 28, 2021
Well, OK, technically it’s the mantle, not the crust.
But it is thick. Super thick. And no gradations like the Earth.
Extrapolating to the known surface geology of the rest of the planet, this suggests an average thickness of between 24km and 72km. By contrast, Earth’s average crustal thickness is 15-20km.
https://www.bbc.com/news/science-environment-57935742
So what does this mean?
For one thing, it probably explains why there’s no breathable atmosphere on Mars.
Mars never developed a global magnetic field to block solar radiation. So it’s atmosphere was basically ripped right off.
And any terraforming attempts in the future would fail on a global scale. But maybe locally it might work…
July 16, 2021
Man, I did it again.
I forgot to post the next chapter of Bringer of Light.
Also the next one after that. And the one after that.
It’s been a very tiring summer so far.
(For starters, we STILL don’t have enough Pfizer or Moderna vaccines, doses are get wasted left and right as the elderly randomly cancel reservations and the bureaucratic pinheads in charge refuse to give them to others, and several students at my school went out drinking and guess what happened…)
I haven’t even posted any science news lately.
But I promise that I’ll make up for it. Soon.
In the meantime, here’s a neat little article about some wild theories of the universe, starting with the Brane Universe and the Big Splat.
Yeah. I thought you might like that one.
https://www.livescience.com/strange-theories-about-the-universe.html?utm_campaign=socialflow
June 27, 2021
Like other nations, China “regards Mars exploration as the preferred destination for deep space exploration,” Wang said.
https://abcnews.go.com/amp/Technology/china-unveils-ambitious-roadmap-human-mars-exploration/
China’s plan calls for setting up a permanently occupied base and a fleet of interplanetary craft. Probably it’s a good idea to first see whether it can meet its goal of landing people on Mars in 2033.
Of course, China is “willing to join hands with our counterparts and partners all over the world,” but it’s unlikely NASA, JAXA, ESA, and the UAE and other countries not named Russia will “cooperate.”
The next space race is here. Just wait until multinats actually decide asteroid mining is worth the risk and expense.
June 25, 2021
It’s becoming increasingly common to see social media posts claiming that the mRNA COVID-19 vaccines, which include those made by Pfizer and Moderna, could alter a person’s DNA. Some posts even suggest that nano-machines are being injected into the body.
https://cosmosmagazine.com/health/covid/technically-no-longer-human-can-mrna-covid-19-vaccines-meld-with-your-dna/
Yeah, I’ve seen some of these posts. Talked to a neighbor who was convinced Bill Gates was trying to inject us all with a chip to control our minds.
Is there any truth to these rumours? Could an mRNA vaccine be modifying your DNA?
No.
(Read the linked Cosmos article for more details!)
Actually, all you need to do is use logic and reasoning, apply some critical thinking, and demand lots of science-based evidence.
It’s called the Baloney Detection Kit and was introduced in a Cornell University undergraduate course about critical thinking and the scientific method by astrophysicist Carl Sagan.
In his book The Demon-haunted World, he lays out nine steps to bust BS and call out unscientific baloney. I use it with my second year undergrad students in a current news and global issues course.
The link above to the kit also outlines some of the most important logical fallacies to avoid, with number 8 and 9 being the most difficult to explain and convince people about (because they involve education about basic statistics).
So will this convince anti-vaxxers who make outlandish claims online?
Probably not. Unless it goes viral 😉.
June 19, 2021
The inclusion of an ion propulsion system in a long-running, Earth-orbiting space station will give researchers a chance to test out the tech while astronauts are still close to home — and if it works as hoped, it could one day ferry explorers to Mars and even more distant destinations.
https://www.freethink.com/articles/ion-propulsion
That’s a big “if.”
Another is what the price will be, since no doubt this neat new tech won’t easily be shared among nation-states.
Just yesterday Chinese astronauts entered their new space station for the first time. They weren’t allowed into the ISS. Now they don’t need the ISS.
The old rivalries will follow humanity into space…but for how long will the rivalries remain…
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