Dawn Mission: Multimedia >Ceres Awaits Dawn.
The Bright Spots of Ceres entice with their “sudden” appearance in sunlight and their delayed fade as they cross the terminator. Is it some bright projection of salty-ice, freshly exuding into a crater floor, or something more dramatic like a salt diapir that has pushed through from below?
Ceres: Its Origin and Predicted Bulk Chemical Composition.
Andrew Prentice’s Modern Laplacian Theory (MLT) has made definite predictions, with a reasonable success rate, for the bodies of the Solar System for the last ~40 years. The latest new body in view of our probes is Ceres, which the MLT predicts is a metal/silicate core wrapped in water ice and salt.
Note Prentice’s statement:
Perhaps Dawn will find the surface of Ceres to be very flat, though roughened through aeons of impacts, with fresh craters having bright floors and ejecta.
…in light of this enigma:
Buck Rogers adventure in Eros.
In its early days, the “Buck Rogers” comic-strip kept an eye on new developments in astronomy and tried for scientific plausibility based on the (admittedly shaky) facts of the day. The asteroid Eros was discovered in 1931 and appeared in a story that same year. A particularly prescient tale it featured a cylindrical habitat 20 miles long and 5 wide, with gravity produced by centrifugal force.
What Comets Are Made Of.
Informative musings from Paul Gilster. Dirty Snowball or Dusty, Greasy Snowball? NASA has tried to replicate what happens to water-ice and hydrocarbons in cryogenic conditions – with unexpected results.
Physics from the edge: MiHsC vs EmDrive: paper link.
Physicist Mike McCulloch’s discussion of the EM-Drive/Q-Drive. He has a theory of inertia which *might* explain the positive EM-Drive tests by the Eagleworks Lab and others. Whether it is the explanation is yet to be determined.
Next Big Future.
Brian Wang’s future-news blog is the Source for the scape of the coming-soon.
[1501.07573] Two restrictions in the theories that include G(t) and c(t) varying with time.
If you want G(t) or c(t) – i.e. the Newtonian Gravitational ‘constant’ or the Speed of Light as functions of time – then you get their co-varying partner. The two are inextricably linked by General Relativity. Interesting short paper that discusses what that means. One eye-opener is that “dark energy” must be being produced by sources that are increasing in number as the Universe expands. Or it’s the “energy of space-time” thus more space-time means more dark-energy.
Colonising the Asteroids is typically imagined as either living in domes on the surface and/or living in excavated tunnels beneath. However, as our knowledge of asteroids has grown, a new location has become apparent – inside the natural cavities that (might) exist within the asteroids. Prior to extensive asteroid studies over the last 20 years, asteroids were conceived of as solid bodies, but as the masses and sizes of the asteroids have been measured by telescopic and radar studies of their shapes, mutual interactions, space-probe flybys and even the orbits of their moons, we’ve come to realise that many asteroids are very “porous”. Not the 1%-5% porosity we know of in soil, but much greater proportions of asteroid insides seem to be just empty space. What if we could use that space?
Gravity Balloons: Colonizing the Asteroid Belt
Gravitational Space Balloons
Life Support – Atomic Rockets.
Important discussion and full of good pointers for further research. The “algae for food” thing might sound strange, but we eat far more than we realise – it’s just processed well.
Peer-reviewed pocket-calculator climate model exposes serious errors in complex computer models.
Something that has been noted before. The IPCC models are prone to exaggeration not supported by the evidence. But, note, it’s still getting f***ing hot and more CO2 is bad news for a lot of marine life. There’s still reasons to reduce fossil-fuels dependence (not least being dependent on their supply from oppressive regimes.) Lord Monckton has been a long-time opponent of Climate Alarmism – not denial that it’s happening, but that it’s as catastrophic as claimed. And he’s probably right. But – note this caveat – just because the global picture isn’t as extreme as portrayed, that doesn’t mean we’re not getting *more* weather chaos. Extremes come from perturbing the system and this is reason enough to wean ourselves off burning stuff for energy.