Geopolymers are regularly used on Earth as an eco-friendly alternative to conventional concrete. One of the main ingredients in concrete is cement, which requires a high-temperature 2 2 manufacturing process that releases a lot of CO 2 . But a geopolymer doesn't require much energy at all. Instead of cement, it uses pulverized rocks or fly ash, the waste product from burning coal.
"Water is very, very valuable on the lunar surface," says Marlies Arnhof, a member of the Advanced Concepts Team at the European Space Agency and a coauthor of the research. "So one of our main goals with this study was to reduce the amount of water necessary to produce a geopolymer."
Many things are taking place:
Crescent Venus, moon, sun | Today's Image | EarthSky
View at EarthSky Community Photos . | Eliot Herman in Tucson, Arizona, wrote: “This is a comparison of crescent images as a montage. Imagery acquired in May 2020 for Venus (in Tucson AZ) upper left, September 2019 for the moon (in Tucson AZ) in the middle, and during the total solar eclipse in July 2019 (in Chile) on the bottom right. Venus was imaged using a 180 mm Skywatcher Mak telescope and the moon a with a Questar Mak telescope. The sun was imaged with 500 mm Nikon lens.
Bottom line: Composite photo of three crescents – Venus, the moon and the sun – at the same phase.
Is your mind playing tricks on you when the moon appears to change sizes? | WKBN.com
Is the moon really bigger when you see it on the horizon compared to when it is high in the sky at night? It does look that way at times. It is actually a trick that your brain is playing on you. It is no bigger when it is on the horizon compared to when it is high in the sky at night.
Big structures can make the moon look bigger. They are close and the moon is far away. This will make the moon look larger. Big machines or city skylines are some examples that may make it look bigger. A mountain range is another.
Of moons and shine and other illuminating topics - Opinion - The Dispatch - Lexington, NC
It was a moonlit night. It almost always is. Except in horror stories, where the moon and stars are nowhere to be seen, and it is pitch dark. In Eastern cultures, a pretty lady’s face is always compared to the moon, with the latter coming off second-best. We have landed several men on the moon. But how much do we really know about moons in general, and ours in particular?
Our moon actually shines. It’s not polite to put “moon” and “shine” next to each other, but why does the moon shine? Well, it doesn’t really shine. Its surface reflects light from the sun: a really “borrowed” shine. And it’s not even very efficient, reflecting only about 3-12% of the sunlight which hits it.
Not to change the topic here:
What May 2020 New Moon In Gemini Means For Your Sign
Astronomers May Have Spotted a Tiny Moon in The Outer Solar System
In the far reaches of the Solar System, past the orbit of Neptune, things start getting trickier and trickier to see. Directly imaging small objects out in the darkness of the Kuiper Belt - where Pluto resides - is really difficult, which makes a recent discovery all the more exciting.
If you know where something is, you can observe it by waiting for it to pass in front of distant stars. This is called occultation, and astronomers use it to study all sorts of trans-Neptunian objects.
Here's how we could mine the moon for rocket fuel | MIT Technology Review
The moon is a treasure trove of valuable resources. Gold, platinum, and many rare earth metals await extraction to be used in next-generation electronics. Non-radioactive helium-3 could one day power nuclear fusion reactors. But there's one resource in particular that has excited scientists, rocket engineers, space agency officials, industry entrepreneurs—virtually anyone with a vested interest in making spaceflight to distant worlds more affordable. It's water.
Why? If you split water into hydrogen and oxygen, and then liquefy those constituents, you have rocket fuel . If you can stop at the moon's orbit or a lunar base to refuel, you no longer need to bring all your propellant with you as you take off, making your spacecraft significantly lighter and cheaper to launch. That's important because Earth's atmosphere and gravitational pull necessitate use of tons of fuel per second when rockets launch.
Duncan Jones’ Kickstarter for Graphic Novel That Ends ‘Moon’ Trilogy | IndieWire
The official “Madi” synopsis reads: “Madi Preston, a veteran of Britain’s elite special operations J-Squad unit, is burnt out and up to her eyeballs in debt. She and the rest of her team have retired from the military but are now trapped having to pay to service and maintain the technology put into them during their years of service.
“It’s a bigger film,” Jones said at the time. “It’s going to be a tricky one to finance in this era where original material on a bigger budget is difficult to get made, so I definitely want to do the graphic novel so at least it will exist in some form. Then, hopefully, if people read the graphic novel and get really excited about it, I’m gonna try and use that as a way to leverage getting the movie made.”
Happening on Twitter
"I don't know if making pee would scale well." Thank you for lending your expertise on lunar resources for this v… https://t.co/osmF0kuOan DMOberhaus (from Brooklyn, NY) Fri May 22 11:05:38 +0000 2020
Add astronaut pee to moon dust, mix well. Voila, a recipe for making cement on the lunar surface! https://t.co/QKT5EWYSWW ScienceNews (from Washington, DC) Wed May 20 18:15:01 +0000 2020
How well would you sleep in space? 💤 NASA's Human Research Program studies how living on the @Space_Station affects… https://t.co/qJhJRdme6Y NASA_Johnson (from Houston, TX) Mon May 18 15:00:33 +0000 2020
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