SpaceX launched Starship on Integrated Flight Test 3 from their Starbase facility in South Texas. SpaceX has conducted static fire test for the next test flight. Credit: SpaceX.
Category: space travel – Page 38
Since the 1950s, nuclear rockets have been seen as a game-changer for space travel. Now, with the combined efforts of the NASA, the Defence Advanced Research Projects Agency (DARPA) and Lockheed Martin, mankind is close to launching the first nuclear spacecraft into orbit for testing, reports Interesting Engineering (IE).
During Prime Minister Narendra Modi’s visit to the US last year, President Joe Biden announced that India and the US were collaborating to send an Indian astronaut to the ISS in 2024.
India’s Astronaut Selection Board had selected four astronauts from the group of test pilots from the Indian Air Force for the Gaganyaan mission, India’s first human space flight planned to take place next year.
“All four astronauts have undergone training on a spaceflight basic module in Russia. Currently, astronauts are undergoing training at ISRO’s Astronauts Training Facility (ATF) in Bengaluru for the Gaganyaan Mission,” Singh said.
The next space station astronaut crew may be the last to splash down in the ocean nearby the U.S. east coast.
The Crew Dragon Crew-9 mission with astronauts is scheduled to launch to the International Space Station no earlier than Aug. 18, perhaps becoming the final NASA-led ISS mission to arrive in the Atlantic Ocean aboard Crew Dragon.
SpaceX is gearing up for the fifth launch of its massive Starship rocket, following four increasingly successful tests. What is the company hoping for, and what can we expect?
Ed Dwight could have been the only black astronaut in the 1960s – but politics got in the way. In 2024, at the age of 90, he finally got his chance to go into orbit.
Humanity has entered a new age of space tourism. For a minimum of $450,000 (£360,000), people with deep pockets can claim the title “astronaut” after a short sub-orbital flight to the edge of space and back and up to 10 minutes experiencing weightlessness above the Earth.
On these near-spaceflights, currently offered by Blue Origin and Virgin Galactic, there is usually one member of the crew whose name and story captures the headlines – and often a free ride.
They say that we ultimately lose information once it enters a black hole, but is this really the case? Let’s find out on today’s video. Have you ever wondered what happens to information when it falls into a black hole? Does it get destroyed forever? Does it arrive somewhere else? Does it enter a girl’s bookcase and call it for Murf? Is there a way for it to escape? Today, we’re diving into one of the biggest mysteries in physics: the black hole information paradox. But first, why should we care? Well, in case a black hole suddenly pops up in your bedroom or office table, this paradox sits at the intersection of quantum mechanics and general relativity, the two pillars of modern physics, and solving it could unlock new understandings of the universe itself. So, let’s get started. Our journey begins with looking at the basics of black holes and the paradox that has puzzled scientists for decades.
Like any good explainer, let’s begin with the basics. What exactly is a black hole? In simple terms, a black hole is a region in space where gravity is so strong that nothing, not even light, can escape from it. No Brad, it’s not a challenge; calm down. This happens when a massive star collapses under its own gravity, compressing all its mass into an incredibly small, incredibly dense point known as a singularity. Surrounding the singularity is the event horizon, the boundary beyond which nothing can return. Think of the event horizon as the ultimate point of no return. Once you cross it, you’re inevitably pulled towards the singularity, and there’s no way back. Feel like you know well about black holes? Great. Now let’s talk about Hawking radiation. In the 1970s, Stephen Hawking proposed that black holes aren’t completely black; instead, they emit a type of radiation due to quantum effects near the event horizon. This radiation, aptly named Hawking radiation, suggests that black holes can slowly lose mass and energy over time, eventually evaporating completely. But here’s where things get tricky: Hawking radiation is thermal. By that, we don’t mean that it’s smoking or anything, but that it appears to carry no information about any of the stuff that fell into the black hole. And this brings us to the heart of our mystery: the black hole information paradox. How can the information about the material that formed the black hole and fell into it be preserved if it’s seemingly lost in the radiation? With this foundation in place, I feel that we’re now ready to explore the paradox itself and the various theories proposed to resolve it.
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Credits: Ron Miller, Mark A. Garlick / MarkGarlick.com, Elon Musk/SpaceX/ Flickr.
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00:00 Introduction.
01:07 What is a Black Hole?
01:54 Hawking Radiation.
02:46 The Black Hole Information Paradox Explained.
04:05 Entanglement Islands.
05:21 Complementarity and Quantum Hair.
06:04 Holographic Principle.
06:48 Recent Calculations and Theories.
07:56 Visualizing Complex Concepts.
09:32 Current State of Research.
11:16 Implications for Physics.
12:06 Recap and Conclusion.
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NASA is very interested in developing a propulsion method to allow spacecraft to go faster. We’ve reported several times on different ideas to support that goal, and most of the more successful have utilized the sun’s gravity well, typically by slingshotting around it, as is commonly done with Jupiter currently.
But, there are still significant hurdles when doing so, not the least of which is the energy radiating from the sun simply vaporizing anything that gets close enough to utilize a gravity assist. That’s the problem a project supported by NASA’s Institute for Advanced Concepts (NIAC) and run by Jason Benkoski, now of Lawrence Livermore National Laboratory, is trying to solve.
The project was awarded a NIAC Phase I grant in 2022, focused on combining two separate systems—a heat shield and a thermal propellant system. According to the project’s final report, combining those two technologies could allow a spacecraft to perform what is known as an Oberth maneuver around the sun.