The Planetary Society’s LightSail launched yesterday, May 20th, 2015.
- Popular Science
The Air Force’s secret robot space plane is going to try out a new engine. The X-37B has so far spent a total of 1367 days tooling around in Earth’s orbit, doing classified things. Yesterday, the Air Force Research Lab announced that on its fourth flight, the X-37B will come with a new fuel-efficient engine for maneuvering in space. Read more
Katie M. Palmer and Neel V. Patel — Wired
You’d be forgiven for forgetting, but Elon Musk and Richard Branson aren’t the only billionaire magnates at the helm of a spacecraft company, gunning to rule the future of privatized space flight. Amazon founder Jeff Bezos’ Blue Origin has been flying under the radar—but at long last, the company yesterday launched its flagship suborbital spacecraft from its West Texas proving grounds in a developmental test flight.
Video released by the company shows the spacecraft, called New Shepard, blasting off to an altitude of 307,000 feet before its crew capsule separates from a propulsion module. Named after the first US astronaut in space, Alan Shepard, the craft is meant to take off and land vertically, utilizing a reusable first-stage booster—the same approach SpaceX is using in its Falcon 9 rocket. Read more
Until 2006 our Solar System consisted essentially of a star, planets, moons, and very much smaller bodies known as asteroids and comets. In 2006 the International Astronomical Union’s (IAU) Division III Working Committee addressed scientific issues and the Planet Definition Committee address cultural and social issues with regard to planet classifications. They introduced the “pluton” for bodies similar to planets but much smaller.
The IAU set down three rules to differentiate between planets and dwarf planets. First, the object must be in orbit around a star, while not being itself a star. Second, the object must be large enough (or more technically correct, massive enough) for its own gravity to pull it into a nearly spherical shape. The shape of objects with mass above 5×1020 kg and diameter greater than 800 km would normally be determined by self-gravity, but all borderline cases would have to be established by observation.
Third, plutons or dwarf planets, are distinguished from classical planets in that they reside in orbits around the Sun that take longer than 200 years to complete (i.e. they orbit beyond Neptune). Plutons typically have orbits with a large orbital inclination and a large eccentricity (noncircular orbits). A planet should dominate its zone, either gravitationally, or in its size distribution. That is, the definition of “planet” should also include the requirement that it has cleared its orbital zone. Of course this third requirement automatically implies the second. Thus, one notes that planets and plutons are differentiated by the third requirement.
As we are soon to become a space faring civilization, we should rethink these cultural and social issues, differently, by subtraction or addition. By subtraction, if one breaks the other requirements? Comets and asteroids break the second requirement that the object must be large enough. Breaking the first requirement, which the IAU chose not address at the time, would have planet sized bodies not orbiting a star. From a socio-cultural perspective, one could suggest that these be named “darktons” (from dark + plutons). “Dark” because without orbiting a star, these objects would not be easily visible; “tons” because in deep space, without much matter, these bodies could not meet the third requirement of being able to dominate its zone.
Continue reading “CERN-Critics: LHC restart is a sad day for science and humanity!” »
By David Lumb — Fast Company
Mars One, the Netherlands-based nonprofit that wants to send human colonists to Mars using private-industry rockets, has been widely criticized for its unrealistic goals and timeline. This week, in a U.S. House Committee hearing for NASA’s 2016 budget, NASA chief administrator Charles Bolden told the committee that “No commercial company without the support of NASA and government is going to get to Mars,” reports Engadget. Bolden’s statement, while not a direct reference to Mars One, certainly seems to support the skepticism surrounding the project. Read more
I read all the news about SpaceX’s Falcon 9 latest “failure” to land on an autonomous spaceport drone ship aka barge. I view these as trials to success. Here’s why.
1. Grasshopper Successes: The two videos below show that the early landing trials aka Grasshopper from several heights between 250m and 1,000m.
The lessons here are:
a) Pinpoint landing of a 1st stage rocket is technologically feasible.
Vivian Giang | Quartz
“‘Mars has been unanimously agreed upon by the world’s space agencies as the ‘horizon goal’ for human spaceflight,’ said Do, part of the MIT research group responsible for a widely read report debunking Mars One’s mission as unfeasible. ‘It is widely agreed that Mars is the most promising destination for near term colonization.’” Read more
By — Clapway
The VASIMR Spaceship Engine or Variable Specific Impulse Magnetoplasma Rocket is the first of its kind that can take people to Mars in just 39 days, compared to 270 days that it would take with a regular spaceship. It is made by Ad Astra Rocket Company and, if all goes well, should definitely shake up the space travel industry.
The VASIMR Spaceship Engine as seen at Ad Astra Rocket uses unique technology in order to reach the high speeds that are necessary to take people to Mars in a very short period of time. It uses a plasma-based propulsion system along with an electric power source in order to fuel said plasma. By fueling the plasma in the right direction, it will propel the engine in that direction as it’s being ejected from the ship.
This mission is part of Ad Astra Rocket Company’s idea to help with the upgrading of current spaceship technology so that deep space missions in the future would not take nearly as long if there were to be humans sent out to different planets. Read more
I read all the news about SpaceX’s Falcon 9 latest “failure” to land on an autonomous spaceport drone ship aka barge. I view these as trials to success. Here’s why.
