Without Mr Jobs to sprinkle his star dust on the event, it felt like just another product launch from just another technology firm.
ECONOMIST: The revolution that Steve Jobs led is only just beginning
That was a letdown for investors who bought stock in the ill-fated Earth Biofuels after hearing about the company from former celebrity backers Morgan Freeman, Willie Nelson and onetime cheerleader Julia Roberts. (See "Willie Nelson And Star Dust").
The older the star, the less dust it had, showing that as time passed the dust was going somewhere.
The infra-red light from dust heated by a star has a much longer wavelength ie, is cooler than most of the light from the star itself, so a camera tuned to the right wavelength can pick out a dust disc without being totally blinded by the stellar glare.
According to Tomsick, the radio emission from the gas and dust surrounding the star make those pulses more difficult to read.
MSN: Runaway star may be fastest pulsar yet - Technology & science - Space - Space.com | NBC News
Most stars in the galaxy are, in fact, in binary systems, and astronomers have been wondering whether the gravity of a second star nearby might disrupt a dust disc too much for planets to coalesce.
Herschel's view of RCW 120, a bubble of gas and dust in space around a massive star.
Under one, small dust grains circling around a parent star collide, get larger and larger, and under the force of gravity develop into a much larger object.
Under one scenario, small dust grains circling around a parent star collide, get larger and larger, and under the force of gravity develop into much larger objects.
Mr. EICHER: We can't really understand the solar system and how it got going unless we can really understand the origins and the conditions that happened when the solar nebula, this cloud of gas and dust, contracted down and the star turned on and the planets got going.
Instead, gas and dust would simply have orbited around our star without moving inward, creating a so-called "dead zone" in the disk.
MSN: Earth's hot formation may be reason behind water shortage
Resembling the towers of the Eagle Nebula, columns of dust shown in the image are oriented toward the central star cluster, pointing to its role in stellar birth.
That is so warm it suggests that the dust is close to Zeta Lep, and is thus being heated by the star.
The Spitzer observations suggest young planets circling the star are disturbing smaller comet-like bodies, causing them to collide and kick up a huge halo of dust.
应用推荐