A quartet of researchers at the University of British Columbia in Canada has calculated that the risk of one or more people being killed by uncontrolled rocket descents over the next decade is approximately 10%. In their ...
A satellite the size of a microwave oven successfully broke free from its orbit around Earth on Monday and is headed toward the moon, the latest step in NASA's plan to land astronauts on the lunar surface again.
Space Exploration
Jul 4, 2022
2
753
Researchers at the Georgia Institute of Technology have developed a concept that would make Martian rocket fuel, on Mars, that could be used to launch future astronauts back to Earth.
Space Exploration
Oct 27, 2021
5
436
Engineers at the University of Cincinnati are developing new ways to convert greenhouse gases to fuel to address climate change and get astronauts home from Mars.
Materials Science
Sep 23, 2021
0
2086
Scientists no longer have to worry about their bottles of mouse sperm breaking in transit. Researchers in Japan have developed a way to freeze dry sperm on a plastic sheet in weighing paper so that samples can withstand being ...
Other
Aug 5, 2021
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422
Swashbuckling billionaire Richard Branson hurtled into space aboard his own winged rocket ship Sunday, bringing astro-tourism a step closer to reality and beating out his exceedingly richer rival Jeff Bezos.
Space Exploration
Jul 11, 2021
20
913
A new study from the lab of Thomas Mallouk shows how microscale "rockets," powered by acoustic waves and an onboard bubble motor, can be driven through 3-D landscapes of cells and particles using magnets. The research was ...
Bio & Medicine
Oct 28, 2019
0
190
For the first time, SpaceX on Friday blasted off both a rocket and a cargo ship that have flown before, a step forward in the company's goal to lower the cost of spaceflight.
Space Exploration
Dec 15, 2017
15
192
(Phys.org)—A team of researchers from the U.S., Japan and Switzerland has found possible evidence of a source of energy that could be responsible for heating the sun's corona. In their paper published in the journal Nature ...
A joint European-Russian mission aiming to search for traces of life on Mars left Earth's orbit Monday at the start of a seven-month unmanned journey to the Red Planet, space agency managers said.
Space Exploration
Mar 14, 2016
14
3084
A rocket or rocket vehicle is a missile, spacecraft, aircraft or other vehicle which obtains thrust by the reaction of the rocket to the ejection of fast moving fluid exhaust from a rocket engine. Chemical rockets create their exhaust by the combustion of rocket propellant. The action of the exhaust against the inside of combustion chambers and expansion nozzles is able to accelerate the gas to hypersonic speed, and this exerts a large reactive thrust on the rocket (an equal and opposite reaction in accordance with Newton's third law).
Rockets, in the form of military and recreational uses, date back to at least the 13th century. Widespread military, scientific, and industrial use did not occur until the 20th century, when rocketry was the enabling technology of the Space Age, including setting foot on the moon.
Rockets are used for fireworks, weaponry, ejection seats, launch vehicles for artificial satellites, human spaceflight and exploration of other planets. While comparatively inefficient for low speed use, they are very lightweight and powerful, capable of generating large accelerations and of attaining extremely high speeds with reasonable efficiency.
Chemical rockets store a large amount of energy in an easily-released form, and can be very dangerous. However, careful design, testing, construction and use minimizes risks.
This text uses material from Wikipedia, licensed under CC BY-SA
