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  2. Galactic year - Wikipedia

    en.wikipedia.org/wiki/Galactic_year

    One galactic year is approximately 225 million Earth years. [2] The Solar System is traveling at an average speed of 230 km/s (828,000 km/h) or 143 mi/s (514,000 mph) within its trajectory around the Galactic Center, [ 3 ] a speed at which an object could circumnavigate the Earth's equator in 2 minutes and 54 seconds; that speed corresponds to ...

  3. Timeline of spaceflight - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_spaceflight

    The list for the year 2025 and for its subsequent years may contain planned launches, but the statistics will only include past launches. For the purpose of these lists, a spaceflight is defined as any flight that crosses the Kármán line , the FAI -recognized edge of space, which is 100 kilometres (62 miles) above mean sea level (AMSL) . [ 1 ]

  4. Portal:Spaceflight/Anniversaries/All - Wikipedia

    en.wikipedia.org/wiki/Portal:Spaceflight/...

    August 12, 1962 - First time two spacecraft were in space at once (Vostok 3 and 4). August 20, 1977 - Voyager 2 launched towards Jupiter, Saturn, Uranus and Neptune. August 23, 1963 - Joseph A. Walker, on X-15 Flight 91, becomes first person to fly into space twice. August 27, 1962 - Mariner 2 launched toward 1st Venus Flyby

  5. Spaceflight - Wikipedia

    en.wikipedia.org/wiki/Spaceflight

    Spaceflight (or space flight) is an application of astronautics to fly objects, usually spacecraft, into or through outer space, either with or without humans on board. Most spaceflight is uncrewed and conducted mainly with spacecraft such as satellites in orbit around Earth , but also includes space probes for flights beyond Earth orbit.

  6. Space travel under constant acceleration - Wikipedia

    en.wikipedia.org/wiki/Space_travel_under...

    For the middle of the journey the ship's speed will be roughly the speed of light, and it will slow down again to zero over a year at the end of the journey. As a rule of thumb, for a constant acceleration at 1 g (Earth gravity), the journey time, as measured on Earth, will be the distance in light years to the destination, plus 1 year. This ...

  7. If You See a Cardinal, Here's the True, Unexpected ... - AOL

    www.aol.com/lifestyle/see-cardinal-heres-true...

    Here's why a Cardinal might fly into your life (and if that's a good thing). ... the cherry red birds called Cardinals can be spotted throughout the United States and as far north as southeastern ...

  8. Orbital spaceflight - Wikipedia

    en.wikipedia.org/wiki/Orbital_spaceflight

    An orbital spaceflight (or orbital flight) is a spaceflight in which a spacecraft is placed on a trajectory where it could remain in space for at least one orbit. To do this around the Earth, it must be on a free trajectory which has an altitude at perigee (altitude at closest approach) around 80 kilometers (50 mi); this is the boundary of ...

  9. Experts Explain What It Means When You See a Cardinal - AOL

    www.aol.com/lifestyle/experts-explain-means-see...

    There is an important meaning and symbolism behind a cardinal, and when you see one it just might bring a message of hope, much like the angel numbers 11:11, 444, and 1212 do when they appear in ...