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@VRubinObs πŸ”­ Today, #astronomers are aware of only about 40 percent πŸ“Š of potentially hazardous #asteroids β˜„οΈ - close-flying objects that are large enough to cause continent-wide destruction if they were to impact πŸ’₯ Earth. "The idea is, if there is an object like that, we want to find it while it’s maybe 40 or 50 years out, because that gives us enough time to figure out how we’re going to deflect it.” https://www.smithsonianmag.com/science-nature/this-revolutionary-new-observatory-will-locate-threatening-asteroids-and-millions-of-galaxies-180984514/

#Observatory#Astronomy#AsteroidThreat

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Only eight #asteroids β˜„οΈ have ever been detected before impact πŸ’₯ with #Earth’s atmosphere. The first of these discoveries took place in πŸ“† 2008, and four were detected in just the last two years https://www.esa.int/Space_Safety/Planetary_Defence/Asteroid_2024_BX1_spotted_three_hours_before_impact

#Asteroid danger explained : "The main challenge stems from the population of middle-size objects, ranging from tens to hundreds of metres in diameter. There are a lot of these asteroids, and most have not been spotted yet." https://www.esa.int/ESA_Multimedia/Images/2018/06/Asteroid_danger_explained

#ESA#AsteroidThreat

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"The bad news is #NASA estimates that it tracks only about 40 percent πŸ“Š of the #asteroids β˜„οΈ #large enough that they could cause calamity if they were to hit πŸ’₯ #Earth" https://www.washingtonpost.com/technology/2022/10/24/nasa-asteroid-telescope

#ESA : #Asteroid danger explained https://www.esa.int/ESA_Multimedia/Images/2018/06/Asteroid_danger_explained

#AsteroidThreat

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The 20-inch diameter #telescope πŸ”­ will carry out a five-year baseline survey to find at least two-thirds of the unknown #NEOs β˜„οΈ larger than 140 meters πŸ“. It will launch around πŸ“† September 2027 to detect and observe #asteroids and comets that could potentially pose an impact πŸ’₯ threat to Earth https://www.aerotime.aero/articles/spacex-nasa-rocket-asteroid

#AsteroidThreat#NASA#Astronomy

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Observations and Quantitative Compositional Analysis of Ceres, Pallas, and Hygiea Using JWST/NIRSpec: https://iopscience.iop.org/article/10.3847/PSJ/ad944c -> "We present JWST Near Infrared Spectrograph (NIRSpec) measurements of the three largest low-albedo main-belt #asteroids: (1) Ceres, (2) Pallas, and (10) Hygiea. Their reflectance spectra all have very similar absorptions centered near 2.72 ΞΌm attributed to Mg–OH in minerals."
#AstroForge is tracking several candidate asteroids, each of which is about 400 meters πŸ“ across. There is no shortage of potential targets. Scientists estimate that there are about 10 million near-Earth #asteroids β˜„οΈ, perhaps 3 to 5 percent of these are rich in #metals, so there are potentially hundreds of thousands of candidates for #mining. https://arstechnica.com/space/2024/08/against-all-odds-an-asteroid-mining-company-appears-to-be-making-headway/

#AsteroidMining#NEA#SpaceMining

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πŸ“† 2016 thesis : It was found that a future space mission to harvest #asteroids β˜„οΈ seems prosperous and even plausible in the near future if using a cost-effective mission architecture, perhaps even within a decade. The necessary knowledge increases quickly due to interests of profit and exploration and #space is among the fastest growing πŸ“ˆ businesses today https://www.lunduniversity.lu.se/lup/publication/8882371

β€’ Remote Sensing Techniques
β€’ Space Shuttles & Technology
β€’ Targeting Asteroids
β€’ Financial Feasibility
β€’ Conclusions

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#AstroForge is tracking several candidate asteroids, each of which is about 400 meters πŸ“ across. There is no shortage of potential targets. Scientists estimate that there are about 10 million near-Earth #asteroids β˜„οΈ, perhaps 3 to 5 percent of these are rich in #metals, so there are potentially hundreds of thousands of candidates for #mining. https://arstechnica.com/space/2024/08/against-all-odds-an-asteroid-mining-company-appears-to-be-making-headway/

#AsteroidMining#NEA#SpaceMining

Launch costs have fallen 95% πŸ“‰ (with another massive reduction expected in the coming years) thanks to reuse, improved engineering, and increased volumes.
β€œIn economics, we assume that resources are limited; land is limited; natural resources are limited. With #space 🌌, it allows us to change that.” https://www.theguardian.com/science/article/2024/may/03/were-in-a-new-era-the-21st-century-space-race-takes-off

#LaunchCost#SpaceMining

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#NASA has contracts with four companies to gather a small amount of material from the lunar πŸŒ™ surfaceβ€”as a proof of concept to show that extraction is possible.
NASA doesn’t have a similar demonstration for mining βš’οΈ #asteroids. But the space rock seekers nevertheless continue their quest for treasure. They believe Earth needs, and will pay handily for, what space 🌌 has to offer. https://arstechnica.com/science/2024/05/in-the-race-for-space-metals-companies-hope-to-cash-in/

#AsteroidMining#MoonMining#SpaceMining