The two interstellar meteorites identified so far seem to be significantly stronger than local meteorites, which may mean they formed in supernovae.
SpaceX has released a video featuring a rocket’s-eye view of a recent orbital mission, all the way from launch to landing.
SpaceX makes 1,000 flights per year the goal for its next-generation Starship.
In 2022 SpaceX set a record for rocket launches achieving 61. But the company’s long-term goal is to get to 1,000 per year in a decade.
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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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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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.
