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  1. en.wikipedia.org › wiki › Interstellar_travelInterstellar travel - Wikipedia

    Interstellar travel is the hypothetical travel of spacecraft between star systems. Due to the vast distances between the Solar System and nearby stars, interstellar travel is not practicable with current propulsion technologies. To travel between stars within a reasonable amount of time (decades or centuries), an interstellar spacecraft must ...

  2. science.nasa.gov › solar-system › 10-things-going10 Things: Going Interstellar - NASA Science

    Jul 26, 2022 · The bubble surrounds the Sun and stretches beyond the planets. Both Voyager spacecraft had to travel more than 11 billion miles (17 billion kilometers) from the Sun in order to cross the edge of the heliosphere. This bubble is moving through interstellar space as the Sun orbits the center of the Milky Way galaxy.

  3. en.wikipedia.org › wiki › Intergalactic_travelIntergalactic travel - Wikipedia

    Intergalactic travel is the hypothetical travel between galaxies. Because the Milky Way and its closest neighbors are separated by millions of light-years, any such venture would also require millions of years based on current physics. Thus, intergalactic travel is impossible within the human lifetime. The technology required to travel between ...

  4. science.nasa.gov › mission › hubbleTime Travel: Observing Cosmic History - NASA Science

    The answer is simply light. The term “light-year” shows up a lot in astronomy. This is a measure of distance that means exactly what it says – the distance that light travels in one year. Given that the speed of light is 186,000 miles (299,000 kilometers) per second, light can cover some serious ground over the course of 365 days.

  5. interestingengineering.com › science › from-point-aFrom Point A to Point B: How Do We Achieve Interstellar Flight?

    May 4, 2019 · In short, the concept involves stretching the fabric of space-time in a wave, which would (in theory) cause the space ahead of an object to contract while the space behind it would expand. An ...

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  6. www.nasa.gov › podcasts › curious-universeSun Series: Soaring Toward the Sun - NASA

    Apr 23, 2024 · For the first time, a NASA spacecraft is flying through the Sun’s atmosphere. Nour Raouafi, project scientist for Parker Solar Probe, explains why the Sun’s corona is the source of one of the biggest mysteries in all of space science. So, what does it take to build a probe that can touch the Sun—including surviving temperatures of 2,500 ...

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  8. science.nasa.gov › sun › factsOur Sun: Facts - Science@NASA

    Our Sun is a medium-sized star with a radius of about 435,000 miles (700,000 kilometers). Many stars are much larger – but the Sun is far more massive than our home planet: it would take more than 330,000 Earths to match the mass of the Sun, and it would take 1.3 million Earths to fill the Sun's volume.

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