Sample return is something of a holy grail to planetary explorers. The advantage is that age dating and extensive compositional analysis can be done better with modern instruments in Earth-based laboratories than on miniaturized instruments that have to prepared years in advance for space flight. Continue reading
Astronomers say they have found a previously inconceivable phenomenon: planets that do not appear to be anchored to a host star but instead wander the heavens unbound. In a two-year scan of the cosmos, 10 planets with roughly the mass of Jupiter, have been found… Continue reading
In fifty years of spaceflight, only 285 piloted spaceships were launched, carrying 1,154 travellers. Since some of them flew more than once, only 515 human beings have flown in space. And only two dozen Americans ventured beyond Earth orbit, up to the Moon, twelve of them having walked on it. Continue reading
Ferengi smugglers shake in their boots as the first step towards tractor beams is announced. In the past, lasers have been used only to impart forward momentum to their targets. They hit objects with photons, and those objects move forward with the beam of light (or burst into flame). Continue reading
Astronomers have identified some 54 new planets where conditions may be suitable for life. Five of the candidates are Earth-sized. The announcement from the Kepler space telescope team brings the total number of exoplanet candidates they have identified to more than 1,200. Continue reading
The most prominent science fiction novels on the subject include: The Last Theorem is Arthur C. Clarke’s posthumously published novel which he co-wrote with Frederik Pohl. The novel describes the skyhook as a means of interplanetary travel rather than simply a means to reach orbit. Continue reading
The use of tethers in space poses many challenges and safety issues. This third part to the tether propulsion article will focus on those issues. A lot of the challenges and safety issues of a space tether system are similar to those of a space elevator described in a previous article, but some are unique to the space tether concept. Continue reading
Having finished writing about the space elevator, I am moving on to another spacelaunch method in this new article in the non-rocket spacelaunch series. Tether propulsion consists in using long, very strong cables (known as tethers) to change the velocity … Continue reading
This is the fourth and final part of the space elevator article of the non-rocket spacelaunch methods article series. This post will focus on references to the space elevator concept in fiction. The first mention of anything remotely similar to a space elevator was the beanstalk in the children’s fairy tale called Jack and the Beanstalk, published in 1807. Continue reading
Earth is not the only planet that could have a space elevator. Variants of the basic space elevator design could also be built on other celestial bodies in the solar system. Most of those variants could fit into three categories… Continue reading