warrenellis + space   114

Sprites: A Chip-Sized Spacecraft Solution
"Peck’s work at Cornell’s Space Systems Design Studio has led to the development of Sprites, fully functional spacecraft each weighing less than a penny. You can think of a Sprite as a spacecraft on a chip without any constraints from onboard fuel."
space 
8 days ago by warrenellis
A Manifesto for Expansion
"The interstellar advocacy is not yet taken seriously by the opinion leaders of any nation, and has yet to win support from any government. That advocacy might do well to reflect on the history of the successful spaceflight advocacy, which took decades to sell its ideas, and only won success in stages."
space 
21 days ago by warrenellis
Stars as Stellar Engines
"a modified Shkadov thruster, a way of moving entire stars that the physicist Leonid Shkadov first described in 1987. In both cases, we’re talking about what can be called ‘stellar engines’ that use the resources of the star itself to create their propulsion. Would such a vast structure be detectible by another civilization?"
space 
28 days ago by warrenellis
Deep Time: Targeting Another Galaxy
"The numbers get more and more mind-boggling as you continue to work the equations. With that same 1 g acceleration (and just how you achieve that is of course the grand question), you can make it all the way to the center of the Milky Way in about 21 years — tens of thousands of years would have passed on Earth by the time you arrived at the galactic core. Or go for the ultimate journey: A voyage to the Andromeda galaxy. To reach M31 in a ship of this sort would take 28 years ship-time as you nudged ever closer, but never reached, the speed of light."
space 
4 weeks ago by warrenellis
NASA wants to send a quadcopter drone to Titan | sUAS News
"NASA wants to search Saturn’s moon Titan for life but they’re having trouble coming up with a good way to cover a large territory and obtain samples. Now they think they may have a good solution: A 22-pound quadcopter that will work from a mothership."
space  drones 
4 weeks ago by warrenellis
A View of the Deepest Future
"How far can biological Life extend into the Long Dark? A study by Robin Spivey extends Life’s tenure, in neutrino-annihilation warmed Ocean Planets, to 1025 years – and Beyond. That’s 100 times longer than the 1023 years we’ve reported here previously and some 1,000 trillion times longer than the time the Universe has presently existed. If the current Age of the Universe was a clock tick – a second -, then those 1025 years would be 20 million years."
space 
4 weeks ago by warrenellis
We could travel to new worlds in NASA's starship Enterprise | The Verge
"Rademaker worked together with NASA's Dr. Harold White to produce visual concepts for the craft. White and his team at NASA are hoping to make "faster-than-light" travel possible with Alcubierre drives. The drives, named for physicist Miguel Alcubierre, theoretically work by distorting space-time. By expanding the space behind a ship and contracting the space in front of it, the IXS Enterprise could drastically speed up our space travel potential, making the 4.3 light-year journey to Alpha Centauri in around two weeks."
space  design+fiction 
6 weeks ago by warrenellis
A Glassy Sea on Titan
"The second largest sea on Titan is Ligeia Mare, made up of methane and ethane in a body of liquid that is larger than Lake Superior. Now we have word that the surface of Ligeia Mare is so utterly still that it would appear like glass. "
space 
march 2014 by warrenellis
Extraterrestrial Dispersal Vectors
"A recent paper on Superhabitable Worlds [2] has suggested that there may be planets or planetary systems more clement to life than the environment of Earth. This implies the possibility that, although Earth looks like a unique oasis in the darkness of space, it may represent a cosmic region of sub-optimal habitability"
space 
february 2014 by warrenellis
Project "Outernet" looking to bring free Internet to entire world
"A small team of workers at a New York based non-profit organization called Media Development Investment Fund (MDIF) has announced its intention to build an "Outernet"—a global network of cube satellites broadcasting Internet data to virtually any person on the planet—for free. The idea, the MDIF website says, is to offer free Internet access to all people, regardless of location, bypassing filtering or other means of censorship."
comms  space  net 
february 2014 by warrenellis
Cosmology in ghost-free bigravity theory with twin matter fluids: The origin of "dark matter" [CL] | arXiver
"We study dynamics of Friedmann-Lemaitre-Robertson-Walker (FLRW) spacetime based on the ghost-free bigravity theory. Assuming the coupling parameters guaranteeing the existence of de Sitter space as well as Minkowski spacetime, we find two stable attractors for spacetime with “twin” dust matter fields: One is de Sitter accelerating universe and the other is matter dominated universe. Although a considerable number of initial data leads to de Sitter universe, we also find matter dominated universe or spacetime with a future singularity for some initial data. The cosmic no-hair conjecture does not exactly hold..." Science writing as demented poetry. My favourite.
sci  space 
december 2013 by warrenellis
We may all be Martians: New research supports theory that life started on Mars
New evidence has emerged which supports the long-debated theory that life on Earth may have started on Mars.
space 
august 2013 by warrenellis
[1111.6131] The Fermi Paradox, Self-Replicating Probes, and the Interstellar Transportation Bandwidth
"We also consider several other models that seek to explain the Fermi Paradox, most notably percolation theory and two societal-collapse theories. In the former case, we find that it imposes unnatural assumptions which likely render it unrealistic. In the latter case, we present a new theory of interstellar transportation bandwidth which calls into question the validity of societal-collapse theories."
space 
may 2013 by warrenellis
Astronomers conduct first remote reconnaissance of another solar system
"The results are "quite strange," Oppenheimer said. "These warm, red planets are unlike any other known object in our universe. All four planets have different spectra, and all four are peculiar. The theorists have a lot of work to do now.""
space 
march 2013 by warrenellis
Team discovers adaptations to explain strategies for survival on Mars
"Research from the University of Maryland School of Medicine has revealed key features in proteins needed for life to function on Mars and other extreme environments."
space 
march 2013 by warrenellis
Astrobiologists Find Ancient Fossils in Fireball Fragments | MIT Technology Review
"They say the stones contain fossilised biological structures fused into the rock matrix and that their tests clearly rule out the possibility of terrestrial contamination. "
space 
march 2013 by warrenellis
The 'habitable edge' of exomoons
"Astronomers have their fingers crossed that within the haul of data collected by NASA's Kepler mission, which has already detected nearly three thousand possible exoplanets, hide the signatures of the very first exomoons."
space 
march 2013 by warrenellis
Wow
"Evidence exists that a large natural nuclear reactor formed and operated on Mars in the northern Mare Acidalium region of Mars"
space 
february 2013 by warrenellis
Nearby ancient star is almost as old as the Universe
"A metal-poor star located merely 190 light-years from the Sun is 14.46+-0.80 billion years old, which implies that the star is nearly as old as the Universe"
space 
february 2013 by warrenellis
Future evidence for extraterrestrial life might come from dying stars
"Even dying stars could host planets with life—and if such life exists, we might be able to detect it within the next decade"
space 
february 2013 by warrenellis
Water on the moon: It's been there all along
""Because these are some of the oldest rocks from the moon, the water is inferred to have been in the moon when it formed," Zhang said."
space 
february 2013 by warrenellis
Radiation, Alzheimer’s Disease and Fermi
"“Galactic cosmic radiation poses a significant threat to future astronauts,” said O’Banion. “The possibility that radiation exposure in space may give rise to health problems such as cancer has long been recognized. However, this study shows for the first time that exposure to radiation levels equivalent to a mission to Mars could produce cognitive problems and speed up changes in the brain that are associated with Alzheimer’s disease.”"
space  med 
january 2013 by warrenellis
The Interstellar Gravitational Assist
"In a 1963 paper, Dyson speculated on how an advanced civilization might use a binary star system made up of two white dwarfs. Send a spacecraft into the system for a close pass around one of the stars and, depending on the mass and orbital velocity of the stars, it is thrown out of the binary system at velocities as high as 3000 kilometers per second. But Dyson took the idea even further. His paper, which appeared as a chapter in a book called Interstellar Communication (New York: Benjamin Press, 1963), described not just white dwarfs but the creation of a binary neutron star system as an engineered launch platform..."
space 
november 2012 by warrenellis
Interstellar travelers may be helped by physicist's calculations that solve the Pioneer anomaly
"Kopeikin's research suggests that the photons move faster than expected from the Newtonian theory thus causing the appearance of deceleration, though the craft were actually traveling at the correct speed predicted by the theory."
space  sci 
october 2012 by warrenellis
Astrobotic Technology assembles prototype of lunar water-prospecting robot
"Astrobotic Technology Inc. has completed assembly of a full-size prototype of Polaris, a solar-powered robot that will search for potentially rich deposits of water ice at the moon's poles. The first of its kind, Polaris can accommodate a drill to bore one meter into the lunar surface and can operate in a lunar regions characterized by dark, long shadows and a sun that hugs the horizon."
space  robots 
october 2012 by warrenellis
Lowering Life’s Chances on Super-Earths
". Rather than being planets much like the Earth but simply more massive — worlds characterized by thick atmospheres, plate tectonics, volcanic activity and magnetic fields — they may differ in fundamental ways. With internal pressures tens of times higher than those found in Earth’s interior, large viscosities and melting temperatures could have adverse consequences on the planet’s habitability."
space 
october 2012 by warrenellis
Red Crucifix sighting in 774 may have been supernova
A supernova may have actually been the mysterious "Red Crucifix" in the sky that is cited in the Anglo Saxon Chronicle for the year 774. New correspondence between a university student and Nature carries interesting observations that astronomers could be looking at a previously unrecognized supernova.
space  history 
july 2012 by warrenellis
Warp Drives May Come With a Killer Downside
"When the Alcubierre-driven ship decelerates from superluminal speed, the particles its bubble has gathered are released in energetic outbursts. In the case of forward-facing particles the outburst can be very energetic — enough to destroy anyone at the destination directly in front of the ship."
space 
may 2012 by warrenellis
On the hunt for high-altitude microorganisms
"XCOR Aerospace is a private California-based company that has developed the Lynx, a reusable launch vehicle that has suborbital flight capabilities. Low-speed test flights are expected to commence later this year, with incremental testing to take place over the following months."
space 
may 2012 by warrenellis
Image: The shake, rattle and roar of the J-2X engine
"The J-2X engine is the first new liquid oxygen and liquid hydrogen rocket engine developed in 40 years that will be rated to carry humans into space. "
space 
may 2012 by warrenellis
The most profitable asteroid is...
"Most Profitable: 253 Mathilde, a 52.8 km-diameter C-type (carbonaceous) asteroid that has an estimated value of over $100 trillion and estimated profit of $9.53 trillion (USD) "
space 
may 2012 by warrenellis
SpaceX, Bigelow announce private space station alliance | Ars Technica
"SpaceX and Bigelow Aerospace have announced a new marketing alliance for SpaceX transportation to Bigelow private space stations. SpaceX will take customers, both private and governmental, to orbit using its Dragon reusable space capsule; Bigelow will host them using its BA330 inflatable space habitats, which will presumably be launched on a larger rocket.  No announcement was made concerning who would carry the stations themselves to orbit."
space 
may 2012 by warrenellis
Cairo Calendar shows Egyptians discovered binary Algol first
"Algol, aka the Demon Star, is actually a binary star in the Perseus constellation, and has been the subject of speculation for hundreds of years. Now a group of Finnish researchers propose that the peculiar behavior of Algol was first noted by the Egyptians some 3200 years ago."
space  history 
may 2012 by warrenellis
Newfangled space-propulsion technology could help clean up Earth orbit
"Winglee and his students continue research in his Johnson Hall laboratory on the possibility of placing mag-beam units in orbit around Earth and around a planet such as Mars that humans might want to explore. With a unit on each end – one to give a spacecraft a high-velocity push on its journey and the other to slow it at its destination – a mission to Mars could be accomplished in as little as 90 days, rather than the 2.5 years it would take with conventional means."
space 
april 2012 by warrenellis
Rocket with secret payload launches from Calif.
Since the launch involved a classified cargo for the National Reconnaissance Office, no details were immediately available about whether it was boosted to its intended orbit.
space  pol 
april 2012 by warrenellis
Planck mission steps closer to the cosmic blueprint
"It comes from the region surrounding the galactic centre and looks like a form of energy called synchrotron emission"
space 
february 2012 by warrenellis
Remote Sensing Tutorial Table of Contents
" Remote Sensing is a technology for sampling electromagnetic radiation comprising a signal emanating from its source target that is used to acquire and interpret non-contiguous geospatial data from which to extract information about features, objects, and classes on the Earth's land surface, oceans, and atmosphere (and, where applicable, on the exteriors of other bodies in the Solar System, or, in the broadest framework, celestial bodies such as stars and galaxies)."
tech  sci  drones  surveillance  space 
february 2012 by warrenellis
Mystery of Britain’s Largest Meteorite Solved. Found at Druids burial site near Stonehenge « Stonehenge News and Information
"With a weight that rivals a baby elephant, a meteorite that fell from space some 30,000 years ago is likely Britain’s largest space rock. And after much sleuthing, researchers think they know where it came from and how it survived so long without weathering away."
space  geo 
february 2012 by warrenellis
BBC News - ExoMars cooperation between Nasa and Esa near collapse
The American space agency looks set to pull the plug on its joint missions to Mars with the European Space Agency... budget woes..."
space 
february 2012 by warrenellis
High planetary tilt lowers odds for life?
"Highly-tilted worlds would have extreme seasons, subjecting life to alternating periods of scorching and subzero temperatures. This could make the development of all but hardiest, simplest creatures a long shot."
space 
february 2012 by warrenellis
LRO lets you stand on the rim of Aristarchus crater
"Have you ever you looked up at the bright, cavernous Aristarchus Crater on the Moon through a telescope or binoculars and wondered what it would be like to stand on the rim and peer inside? Spectacular new views from the Lunar Reconnaissance Orbiter is almost as good as being there, and a new video lets you “rappel” down and take a closer look at the west side of the crater walls."
space 
january 2012 by warrenellis
Space mountain produces terrestrial meteorites
"When NASA's Dawn spacecraft entered orbit around giant asteroid Vesta in July, scientists fully expected the probe to reveal some surprising sights. But no one expected a 13-mile high mountain, two and a half times higher than Mount Everest, to be one of them."
space 
january 2012 by warrenellis
Should we terraform Mars?
"planetary ecosynthesis" - nice term. Also, I believe the answer is Yes.
space 
january 2012 by warrenellis
Strange hollows discovered on Mercury
Images taken from orbit reveal thousands of peculiar depressions at a variety of longitudes and latitudes, ranging in size from 60 feet to over a mile across and 60 to 120 feet deep. No one knows how they got there.
space 
october 2011 by warrenellis
Latest Cassini images of Enceladus on view
Raw, unprocessed images from the successful Oct. 19 flyby of Saturn's moon Enceladus by NASA's Cassini spacecraft provide new views of the moon and the icy jets that burst from its southern polar region.
space 
october 2011 by warrenellis
New view of Vesta mountain from Dawn mission
A new image from NASA's Dawn spacecraft shows a mountain three times as high as Mt. Everest, amidst the topography in the south polar region of the giant asteroid Vesta.
space 
october 2011 by warrenellis
Dream is over for Virgin Galactic space tourist
""Everything in aerospace always takes longer that you originally think," he said."
space 
october 2011 by warrenellis
Enceladus weather: Snow flurries and perfect powder for skiing
"Global and high resolution mapping of Enceladus confirms that the weather forecast for Saturn's unique icy moon is set for ongoing snow flurries. The superfine ice crystals that coat Enceladus's surface would make perfect powder for skiing, according to Dr Paul Schenk of the Lunar and Planetary Institute"
space 
october 2011 by warrenellis
Simon Faithfull Escape Vehicles
"“Like all works in the Escape Vehicles series no.1 [1996] and no.2 [1997] are tinged with the melancholy of failure. "
art  space 
september 2011 by warrenellis
Water supersaturation in the Martian atmosphere discovered
"Extremely high levels of supersaturation were found on Mars, up to 10 times greater than those found on Earth. Clearly, there is much more water vapour in the upper Martian atmosphere than anyone ever imagined."
space 
september 2011 by warrenellis
BBC News - Rocket launches Chinese space lab
"A rocket carrying China's first space laboratory, Tiangong-1, has launched from the north of the country. Tiangong means "heavenly palace" in Chinese."
space 
september 2011 by warrenellis
SpaceX says 'reusable rocket' could help colonize Mars
"The US company SpaceX is working on the first-ever reusable rocket to launch to space and back, with the goal of one day helping humans colonize Mars, founder Elon Musk said Thursday."
space  probably+not+but+still 
september 2011 by warrenellis
Computer simulation shows Solar System once had an extra planet
"A new study published on arXiv.org shows that, based on computer simulations, Jupiter, Saturn, Uranus and Neptune may not have been the only gas giants in our solar system. According to David Nesvorny from Colorado’s Southwest Research Institute, our current solar system could never have happened without the existence of a fifth planet."
space 
september 2011 by warrenellis
Super-earth exoplanet found that could support life | Science | guardian.co.uk
Astronomers say they have found a second planet outside our solar system which is the right distance from its star to potentially support life. But any possible inhabitants would have to have a taste for an environment that felt like a hot steam bath.
space 
september 2011 by warrenellis
Blazars
A blazar is a galaxy which, like a quasar, has an intensely bright central nucleus containing a supermassive black hole. In a blazar, however, the emitted light sometimes includes extremely high energy gamma rays, sometimes over a hundred million times more energetic than the highest energy X-rays that the Chandra X-ray Observatory can study.
space 
september 2011 by warrenellis
Cosmic coincidence
Lineweaver and Egan propose that it is unlikely that any intelligent life could have evolved in the universe much earlier than now (give or take a couple of billion years) since you need to progressively cycle through the star formation and destruction of Population III, II and then I stars to fill the universe with sufficient ‘metals’ to allow planets with evolutionary ecosystems to develop.
space 
september 2011 by warrenellis
New theory suggests Mars was once cold and wet
Alberto Fairуn, an astrobiologist who works for both the SETI Institute (the group using radio telescopes to listen for extraterrestrial life) and NASA’s Ames research center, along with colleagues, has published a paper in the journal Nature Geoscience, in which they describe ancient Mars as cold and wet with a large northern hemispheric ocean whose edges were lined with glaciers.
space 
august 2011 by warrenellis
Greenhouse effect could extend habitable zone
The distant region beyond Saturn is too cold for liquid water, a necessity for life as we know it. But new research indicates that rocky planets far from their parent star could generate enough heat to keep water flowing - if their atmospheres were made up primarily of hydrogen.
space 
august 2011 by warrenellis
Russia grounds rockets after launch failure
Russia on Tuesday grounded its workhorse Proton-M rockets after the latest in a string of launch mishaps put a prized telecommunications satellite into the wrong orbit.
space 
august 2011 by warrenellis
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