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In the Known Space universe, constructed by Larry Niven, Earth uses constant acceleration drives in the form of Bussard ramjets to help colonize the nearest planetary systems. In the non-known space novel A World Out of Time , Jerome Branch Corbell (for himself), "takes" a ramjet to the Galactic Center and back in 150 years ships time (most of ...
Different theories of dark energy suggest different values of w, with w < − 1 / 3 for cosmic acceleration (this leads to a positive value of ä in the acceleration equation above). The simplest explanation for dark energy is that it is a cosmological constant or vacuum energy; in this case w = −1.
ESA plans to conduct an orbital test flight of the Space Rider uncrewed spaceplane in the third quarter of the year. [ 9 ] SpaceX expects to perform an in-space propellant transfer demonstration using two docked Starships in 2025—a critical milestone that will allow SpaceX to refuel their Starship HLS vehicle for an uncrewed lunar landing ...
Space exploration is about reaching the destination ... The two values differ by a factor of the standard acceleration due to gravity, g n, 9.80665 m/s² ...
The term outward space existed in a poem from 1842 by the English poet Lady Emmeline Stuart-Wortley called "The Maiden of Moscow", [13] but in astronomy the term outer space found its application for the first time in 1845 by Alexander von Humboldt. [14] The term was eventually popularized through the writings of H. G. Wells after 1901. [15]
A space tower is a tower that would reach outer space.To avoid an immediate need for a vehicle launched at orbital velocity to raise its perigee, a tower would have to extend above the edge of space (above the 100 km Kármán line), [26] but a far lower tower height could reduce atmospheric drag losses during ascent.
Space exploration also gives scientists the ability to perform experiments in other settings and expand humanity's knowledge. [67] Another claim is that space exploration is a necessity to humankind and that staying on Earth will eventually lead to extinction. Some of the reasons are lack of natural resources, comets, nuclear war, and worldwide ...
Escape and Plasma Acceleration and Dynamics Explorers (ESCAPADE) is a planned spacecraft mission to Mars consisting of two spacecraft known as Blue and Gold. [ 3 ] [ 2 ] The mission, once expected to launch in October 2024, is part of NASA 's SIMPLEx program.