Sam Baron, Australian Catholic University.
Black holes form natural time machines that allow travel to both the past and the future. But don’t expect to be heading back to visit the dinosaurs any time soon. At present, we don’t have spacecraft that could get us anywhere near a black hole. But, even leaving that small detail aside, attempting to travel into the past using a black hole might be the last thing you ever do.
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As we seek to travel vast distances to claim the galaxy, we will need to develop strategies and methods for voyaging through deep space and reaching strange new worlds.
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Credits:
Interstellar Colonization Strategies.
Science & Futurism with Isaac Arthur.
Episode 376, January 5, 2023
Written, Produced & Narrated by Isaac Arthur.
Editors:
Donagh Broderick.
Evan Schultheis.
Graphics by:
An engine idea that can accelerate to 99 percent of the speed of light, all without the need for propellant. That may sound like something out of a science fiction movie, but it’s not. This is exactly what one of NASA engineers is developing, and it promises to break the law of physics.
How will these engines be developed? If it is going to work without propellant, then what will be its fuel? And most importantly, will a human be able to travel in a vehicle with such an engine as its thruster? Well, we will find out in just a second.
Lasers find applications across several fields ranging from telecommunications and remote sensing to medicine. There are many ways in which one can generate laser emission, or lasing, from a device or material. Consequently, there are many types of lasers with different principles of operation.
One emerging and promising method to achieve lasing with high energy efficiency is by leveraging what are known as “bound states in the continuum” (BICs). In simple terms, these states describe waves that remain highly localized in space but coexist with a continuous spectrum of waves that are not localized (traveling waves). When dealing with light, an electromagnetic wave, BICs can be realized by carefully designing the geometry of a confining periodic structure.
Although scientists have already reported a few types of BIC-based lasers, most of them can only emit a beam in a perfectly or almost perfectly vertical direction away from the surface of the device. This limitation hinders the use of such BIC lasers in applications where angling the emitted beam is necessary.
NASA may turn to its commercial partner SpaceX to transport three astronauts back to Earth after a Russian Soyuz spacecraft suffered a coolant leak in mid-December.
In a blog post published on Friday, NASA said that it “reached out to SpaceX about its capability to return additional crew members aboard Dragon if needed in an emergency.” At the moment, NASA is investigating whether or not the Soyuz spacecraft would still be capable of carrying astronauts on the trip back from the International Space Station, the space agency added.
NASA published a video from its Artemis I Orion spacecraft, when it saw Earth disappear behind the Moon at the halfway point of its mission.
The spaceplane that will carry passengers to the “space business park” features its own inflatable space habitat.
Amazon founder Jeff Bezos’ space company, Blue Origin, has been hard at work alongside Colorado-based startup Sierra Space on the Orbital Reef project.
The two companies behind the project recently blasted a module prototype for the station to pieces as part of an ongoing test campaign.
There is growing concern over China’s Moon ambitions.
The race to the Moon between the United States and China is becoming increasingly fierce, and the next two years could determine who wins. During an interview with Politico.
Wikimedia Commons.
During an interview with Politico, NASA Administrator Bill Nelson warned that if China were to win the space race, it may establish territory on the Moon and dominate the areas rich in minerals and other resources or even block other countries from making a lunar journey.
NASA’s unmanned Artemis mission to the moon was a small step toward the ultimate goal of sending humans to Mars and beyond.
The second goal was to figure out how to settle and exploit the resources of the moon for research teams by the middle of the following decade.
Neil deGrasse Tyson explains in great detail how our universe came to be. And whether it has a center.
Neil deGrasse Tyson also explains what it would mean to be on the “edge” of the universe.
Brian Greene also chimes in on important concepts about the universe such as the ultimate speed limit which is the speed of light in a vacuum.
Michio Kaku then explains that a type 3 civilization using warp drives could travel to the “edge” of the universe.
Brian Cox also encapsulates our advancement in science for the last 500 years and what it means for humanity.
#science #universe #space
