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  #931  
Old 02-11-18, 10:44 AM
lotr10 lotr10 is offline
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Everyone loves Bubbles! Especially those produced in zero g!

https://phys.org/news/2018-02-fluids-space.html

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  #932  
Old 02-12-18, 09:21 PM
lotr10 lotr10 is offline
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Life on Mars may be just under the surface!

https://www.sciencedaily.com/release...0206100338.htm

However, all hope for life on Mars is not lost. In another paper led by Michalski and published recently, the scientists point out that the prospects for surface life on Mars might be dim, but the possibilities for subsurface life are promising. Life on Earth likely began in hydrothermal systems (environments where hot water reacts with rocks), and there is abundant evidence for many locations where hydrothermal environments exists on Mars at the time when life might have originated in similar environments on Earth. They argue that, in order to understand how life formed on Earth, we should ignore the surface environments on Mars and focus exploration on hydrothermal deposits.
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  #933  
Old 02-12-18, 09:24 PM
lotr10 lotr10 is offline
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Did you know that NASA wants to build a space submarine!?!

https://www.sciencedaily.com/release...0207151820.htm

Building a submarine gets tricky when the temperature drops to -300 Fahrenheit and the ocean is made of methane and ethane. Researchers are working to determine how a submarine might work on Titan, the largest of Saturn's many moons and the second largest in the solar system. The space agency plans to launch a real submarine into Titan seas in the next 20 years.

Wow, this sounds like a tough engineering nut to crack. But man will the video be cool!
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  #934  
Old 02-14-18, 09:44 AM
lotr10 lotr10 is offline
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This is a fun article:

https://www.popularmechanics.com/sci...save-humanity/

I definitely agree with this as the #1 mega project to complete:

We live in a scary universe where errant space rocks can—and have—wrought destruction on a planetary scale. We get hit all the time, and it’s just a matter of time until a big enough world-killer sails into view of our space telescopes. The plan, as anyone who’s seen Armageddon knows, is to nuke the hell out of it. The point is not to blow it into still-dangerous fragments, but to knock the rock off its destructive course.

As satisfying as that plan sounds, there’s a lot we don’t know about nuking space rocks. Not all asteroids are composed of the same thing, muddling models of the effects of a detonation. some say better deflection is caused with a surface detonation, others advise to detonate at a distance to zap more surface area and cause more movement.


And this one is by far the most interesting:

In 1992 Russia launched a solar mirror called Znamya 2 with a unique mission—to beam reflected light back to the planet, raking western Russia with extra light equivalent to a full moon. The patch of light was 5km wide and traveled across Europe at 8km a second. A second attempt failed in space when the sail snagged on an antenna as the flexible mirror unfurled.

So it’s certainly possible to use solar reflectors to change the amount of solar energy that pours into the Earth, but would you want to? Doesn’t the proposed Geoengineering Research Act in 2016 want to seed clouds with sulfur to make them more reflective, so do we really need more sunlight when global warming is the problem?


Now I get how "controlling" the sun could have some nice benefits here on earth but I can't help but think about a kid on a sunny day with a magnifying glass roasting ants!
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  #935  
Old 02-14-18, 09:46 AM
lotr10 lotr10 is offline
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You just knew there had to be more in the payload then Musk's Tesla car in that recent SpaceX Falcon Heavy rocket launch:

https://www.sciencealert.com/spacex-...ars-tesla-arch
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  #936  
Old 02-15-18, 04:53 PM
lotr10 lotr10 is offline
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Now this is what I call thinking BIG:

https://www.nextbigfuture.com/2018/0...-in-space.html

Nextbigfuture described how 200 large space stations could be built by 2040 to hold 2 million people. There are videos that provide more details on the SpaceX BFR and the Kalpana space station.


And this is what I call thinking practically:

https://www.popularmechanics.com/mil...ay-satellites/

Your phone is not going to work on the day nuclear war starts. But the U.S. President, National Security Council, and combat commanders count on being able to communicate. This doomsday connection relies on what we call Advanced Extremely High Frequency (AEHF) satellites that sit in geostationary orbit.

“We need systems that work on the worst day in the history of the world,” says Todd Harrison, director of the Aerospace Security Project at the Center for Strategic and International Studies.
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  #937  
Old 02-17-18, 09:34 AM
lotr10 lotr10 is offline
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Remember this strange object from an article posted a couple of weeks ago here:

https://www.livescience.com/61742-ou...lent-past.html

To call this "asteroid" weird is an understatement. First off it's our first confirmed interstellar visitor and second it looks like a space ship!

An interstellar object called 'Oumuamua has confounded astronomers ever since it passed through our solar system in October of last year.

Scientists initially thought that the object — the first-ever visitor from another solar system spotted by Earth-based telescopes — was a comet. Later, they considered it an asteroid and even later described it as a possibly comet-like icy body with a rocky crust.

Now, scientists have found that in addition to its confusing appearance, 'Oumuamua — an up to 1,300-foot-long (400 meters), cucumber-shaped object — likely has a rather dramatic history.


I don't care what they say, until proven otherwise it looks like an alien ship to me. And it's been roughed up a bit:

Oumuamua's erratic motion might be a result of a collision with another asteroid, said Wes Fraser, one of the researchers behind the latest paper on 'Oumuamua, published Feb. 9 in the journal Nature Astronomy. This collision, in fact, may have been what thrust 'Oumuamua out of its native solar system and on a trajectory toward the sun.

Or maybe it got into a fight with another alien star ship?

Oh and for the record who names these things? Oumuamua? Just call the damn thing "Joe" and be done with it.
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  #938  
Old 02-19-18, 05:01 PM
lotr10 lotr10 is offline
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It's always fun to read about space mega structures!

https://www.popularmechanics.com/spa...uilt-in-space/

A rocket blasts off from the launchpad, carrying a couple dozen tons of cargo into space. In the span of a few minutes, the rocket accelerates to around 17,500 miles per hour, orbiting the Earth at nearly 300 miles above the surface.

What is this rocket carrying? Perhaps a communications satellite, a NASA spacecraft, or some payload for the military? Actually, the rocket isn’t even carrying a spacecraft at all. Instead, its payload contains several tons of high-grade plastic and pre-fabricated components, material that will be fed to a 3D printer waiting in orbit. This futuristic printer will then use the plastic and components to construct a functional satellite spanning several miles.

A mile-wide satellite might sound impossible, but that’s exactly where the space industry is headed. In the future, giant telescopes, communication satellites, solar arrays, and space stations will fill the space around the Earth, and many of them will be several times larger than anything ever built on the surface.


Using 3D printers to create huge space structures seems plausible to me. Taking advantage of low gravity to use 3D printers to engineer space based marvels is going to happen sooner rather than later.
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  #939  
Old 02-19-18, 05:11 PM
eastisbest eastisbest is offline
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the knock on 3D materials is durability (for now). Probably won't be used on anything force critical but those non-critical things subject to predicatable forces? Cool. One step closer to society in space. Might be good for short term critical replacements until actuals can arrive.

What is the turn-around on a Space-X? Real emergency, how fast can the space programs respond?

FYI: I finished the Jack Cambell. Impressed that the last book was maybe the most enjoyable of the lot. If the author didn't have this end-game in mind from the start he did an excellent job of jurying rigging it in.

Just began another series, this by Stephan Baxter: First contact, exploration type novel. "Proxima" Very promising.
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  #940  
Old 02-20-18, 08:26 AM
lotr10 lotr10 is offline
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Quote:
Originally Posted by eastisbest View Post
FYI: I finished the Jack Cambell. Impressed that the last book was maybe the most enjoyable of the lot. If the author didn't have this end-game in mind from the start he did an excellent job of jurying rigging it in.

Just began another series, this by Stephan Baxter: First contact, exploration type novel. "Proxima" Very promising.
I've fallen way behind on my fiction reading and have a backlog of books including a couple from Campbell and Baxter I need to read. BTW, Baxter is very good. Right now I'm reading Peter Hamilton's The Great North Road, which is outstanding.
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  #941  
Old 02-21-18, 09:02 AM
lotr10 lotr10 is offline
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Here's some good news on the space exploration front! Of course it involves SpaceX and the Falcon Heavy rocket!

https://gizmodo.com/falcon-heavy-may...ber-1823116009

Asteroid mining is about more than just heading up into space and bringing back a rock full of platinum—you actually need to land something on just the right asteroid.

Falcon Heavy, the world’s most powerful rocket launched by Elon Musk-led SpaceX two weeks ago, may have changed the game, says one astronomer.

“Instead of a few hundred we may have thousands of ore bearing asteroids available,” Martin Elvis from the Harvard-Smithsonian Center for Astrophysics told an audience at the American Association for the Advancement of Science annual meeting in Austin, Texas.

Asteroids could be ripe with natural resources, including water and heavy metals like platinum, as we’ve reported. Space colonialists like Planetary Resources hope to get mining equipment onto one of those nearby ‘roids to bring the resources back down to Earth and turn into space John D. Rockefellers. But there are tons of challenges—including landing on the asteroids themselves.


Humanity will finally find El Dorado and it will be in the asteroid belt.
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  #942  
Old 02-21-18, 08:04 PM
eastisbest eastisbest is offline
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I'd send one big rocket up with a bunch of parasitic ones.. Then when close to the belt, release them all to find a home and start sampling asteroids and sending back data.
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  #943  
Old 02-23-18, 11:12 AM
lotr10 lotr10 is offline
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Quote:
Originally Posted by eastisbest View Post
I'd send one big rocket up with a bunch of parasitic ones.. Then when close to the belt, release them all to find a home and start sampling asteroids and sending back data.
My guess is that something like this is exactly what they will do. A "mother-ship" will bring the bots to the belt and then they'll be launched in a spread pattern to land on a whole bunch of asteroids, dig in a bit and start sending back information. If the asteroid belt is as rich in strategic minerals as scientists think then we'll have a "gold" rush on our hands!
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  #944  
Old 02-23-18, 11:18 AM
lotr10 lotr10 is offline
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Mars or bust! The idea of nuclear rockets is making a come back!

https://www.popularmechanics.com/spa...-engines-mars/

To accomplish what will be the greatest human spaceflight triumph since Apollo 11—sending astronauts to Mars—NASA is looking to a blast from its nuclear past.

Today's chemical propellant rocket engines may not be the fastest or most efficient way to send a crew to another planet. One idea for the next-generation rocket engine you'd need is to bring back nuclear thermal propulsion (NTP) systems. The technology was studied in the 1950s and 60s, but shelved in the early 70s because of technological challenges, and because there was no clear need for the propulsion system.

Jeff Sheehy, chief engineer of NASA's Space Technology Mission Directorate, says times have changed. Advances in manufacturing, materials science, and engineering have made it possible to design a better fuel element and nuclear reactor than was possible during the Cold War. What's more, and what has really been lacking until now, is a reinvigorated "desire to send crews into deep space," says Sheehy. "I mean the desire has always been there, but the push or the emphasis that NASA has had for the last few years about developing that capability—that has renewed the interest in NTP as an option."


This is a great article if you want to learn how nuclear rockets work and why they may be the key to successfully colonizing the solar system. This is also a nice example of how NASA defines a need and sets the parameters and then sub contracts a specialist company to deliver the goods. This time it's a company that produces nuclear fuel for the US navy.
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  #945  
Old 02-24-18, 04:17 PM
eastisbest eastisbest is offline
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Trailer for the new "Lost in Space" is out. Not promising. Voice over actor has no gravitas, even Robot sounds less tech advanced even that the one from the 60s. Someone stupid in charge here. The original idea was quite serious but it looks like they're going for demographic. Cute kids, cute robot.... instead of serious science. as originally intended.
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  #946  
Old 02-25-18, 09:30 AM
lotr10 lotr10 is offline
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Quote:
Originally Posted by eastisbest View Post
Trailer for the new "Lost in Space" is out. Not promising. Voice over actor has no gravitas, even Robot sounds less tech advanced even that the one from the 60s. Someone stupid in charge here. The original idea was quite serious but it looks like they're going for demographic. Cute kids, cute robot.... instead of serious science. as originally intended.
Yea I saw the trailer and it looked pretty bad. That's why I admire shows like The Expanse, which at least try to present something fresh in science fiction.
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