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2. Interstellar travel - Wikipedia

   en.wikipedia.org/wiki/Interstellar_travel

   A Bussard ramjet, one of many possible methods that could serve to propel spacecraft. 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.

3. Voyages of Christopher Columbus - Wikipedia

   en.wikipedia.org/wiki/Voyages_of_Christopher...

   [17] [15] Moreover, Columbus underestimated Alfraganus's calculation of the length of a degree, reading the Arabic astronomer's writings as if, rather than using the Arabic mile (about 1,830 m), he had used the Italian mile (about 1,480 meters). Alfraganus had calculated the length of a degree to be 56⅔ Arabic miles (66.2 nautical miles). [15]

4. TRAPPIST-1d - Wikipedia

   en.wikipedia.org/wiki/TRAPPIST-1d

   TRAPPIST-1d is a closely orbiting planet, with one full orbit taking just 4.05 days (about 97 hours) to complete. [7] It orbits at a distance of just 0.02228 AU from the host star, or about 2.2% the distance between Earth and the Sun. [3]

5. Astronomical unit - Wikipedia

   en.wikipedia.org/wiki/Astronomical_unit

   Distance light travels in one Julian year (365.25 days) — Oort cloud: 75 000: ± 25 000: Distance of the outer limit of Oort cloud from the Sun (estimated, corresponds to 1.2 light-years) — Parsec: 206 265 — One parsec. The parsec is defined in terms of the astronomical unit, is used to measure distances beyond the scope of the Solar ...

6. GN-z11 - Wikipedia

   en.wikipedia.org/wiki/GN-z11

   Up until the discovery of JADES-GS-z13-0 in 2022 by the James Webb Space Telescope, GN-z11 was the oldest and most distant known galaxy yet identified in the observable universe, [7] having a spectroscopic redshift of z = 10.957, which corresponds to a proper distance of approximately 32 billion light-years (9.8 billion parsecs).

7. Geographical exploration - Wikipedia

   en.wikipedia.org/wiki/Geographical_exploration

   This was followed by the Age of Discovery after European scholars rediscovered the works of early Latin and Greek geographers. While the Age of Discovery was partly driven by European land routes becoming unsafe, [ 3 ] and a desire for conquest, the 17th century saw exploration driven by nobler motives, including scientific discovery and the ...

8. News, Politics, Sports, Mail & Latest Headlines - AOL.com

   homepage.aol.com

   Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.

9. Speed of light - Wikipedia

   en.wikipedia.org/wiki/Speed_of_Light

   Approximate light signal travel times; Distance: Time: one foot: 1.0 ns: one metre: 3.3 ns: from geostationary orbit to Earth: 119 ms: the length of Earth's equator: 134 ms: from Moon to Earth: 1.3 s: from Sun to Earth (1 AU) 8.3 min: one light-year: 1.0 year: one parsec: 3.26 years: from the nearest star to Sun (1.3 pc) 4.2 years: from the ...