Using gravitational microlensing, scientists are able to determine when the gravity of a large object alters the light coming from a star on its way to Earth.
Then a marine geologist, James Kennett of the University of California, Santa Barbara, said he had found evidence of the impact of a large object from space 12, 900 years ago, in the form of carbon spherules in silt.
WSJ: Matt Ridley on New Support for a Global-Cooling Theory | Mind & Matter
The magnetometer will record what, if any, magnetic field the asteroid has, thus revealing whether it was ever part of an object large enough to have possessed the molten iron core needed to generate such a field.
The bigger problem: Despite being the cleanest energy available, some environmental groups object to large wind turbines spoiling the landscape, as well as the impact on migrating birds.
Unlike recycling of popular base metals like copper and aluminum which might make up a large portion of an object, the problem with trying to increase recycling of specialty metals is that they are used in only sparingly in the high-tech equipment.
FORBES: INTERVIEW: Recycling Of Specialty Metals Needs Improvement - Yale Researcher
In this scenario, the gamma ray burst was caused by a large, comet-like object that fell into a neutron star.
FORBES: Scientists Develop Two Scenarios For Cosmic Christmas Explosion
Some panel members say they favor counting any object which is large enough that its gravity has made it round.
According to the physicists, when a large black hole captures a smaller object like a medium-sized star the process causes gravitational radiation to be emitted in a preferential direction.
Scientists made the discovery first by pinpointing their target through infrared images from the Canada-France-Hawaii Telescope, and later using the Very Large Telescope to deduce that the object was both too small to be a star as well as hot and young enough (752F and under 120 million years old) to fit the behavior of a planet orphaned early into its existence.
They object to the building of a large-scale retail project which they said could damage town-centre shopping.
The safety board said at the time that 12 accidents since 1993 had involved a large aircraft's wingtip hitting another airplane or object on the taxiway.
Highly dependent as they are on stocks and asset inflation for their income, the gentry are not likely to object to the administration's coddling of large financial institutions.
"A 5mm (0.2 inches) particle striking a large solar array is likely to have a very little long-lasting effect, but such an object hitting the main body of a satellite could cause a vital component to fail, " he said.
Many secular Israelis object to the exemptions from army service given to students at religious seminaries or yeshivas and the large state subsidies that their institutions receive.
应用推荐