Saturn Rings: F is for Flamboyant
July 2, 2008
Cassini provides additional evidence that Saturn's F-ring is young.
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Cosmology at the Outer Limits
June 30, 2008
Those who think cosmology could not get any weirder than it already is (01/15/2008) may want to take note of recent pronouncements by the gurus of universal physics. Physics teachers in particular may feel an obligation to state Bob Berman’s disclaimer (10/06/2004) before class: viz, “Warning: The following contains contemporary cosmology. Reading it can produce […]
Hopes Die for Enceladus Longevity
June 19, 2008
Ever since Enceladus, the little 300-mile-across moon of Saturn was found in 2005 to be erupting out its south pole, scientists have tried to explain how it could be possible. They have looked high and low for an energy source to power the geysers of the little moon dubbed “Cold Faithful” for billions of years. […]
Divining the CMB
June 12, 2008
What do you see in this pattern? Look very closely. The Cosmic Microwave Background (CMB) is a faint glow of electromagnetic radiation that pervades the universe. What it means is a matter of intense and sometimes bizarre speculation by cosmologists. The spectrum of the CMB matches almost perfectly that of an ideal radiator, […]
Alien Messages via Neutrinos
June 6, 2008
Three scientists are suggesting that SETI researchers comb neutrinos for alien messages. Nothing natural could produce high-energy neutrinos, they said in Science,1 so aliens may use their cosmic accelerators to send neutrino packets across the intergalactic internet. They suggested watching for them in the neutrino detector at the South Pole. 1. Random Samples, Science, Volume […]
Preparing the World for Aliens
May 29, 2008
Some people are so convinced there are alien intelligences in the universe, we should be getting ready to meet them. The Telegraph, a UK newspaper, reported that NASA has partly financed a creative writing class on “interstellar message composition” at the University of Wyoming. Professor Jeffrey Lockwood wants to help the 11 students […]
Mars Life Hopes Suffer Double Disappointment
May 29, 2008
Just when the new Phoenix lander was flexing its arm and going to work (see JPL), hoping to determine the habitability of Mars, two papers came out expressing doubt it will find anything. Toxic salty stew: Space.com summarized a new paper in Science1 that concluded Mars has way too much salt. Although some earth organisms […]
The Phoenix Lands on Mars
May 26, 2008
The Phoenix Spacecraft successfully landed on Mars Sunday night. Its mission is to look for water and the potential habitability of life in the northern latitudes of the red planet near its polar cap for the next 3 months. This is the first soft landing on Mars in 32 years, and the third in history […]
Moon Still Feeling the Impact
May 21, 2008
Craters on the moon seem so old. Astronomers count them to try to figure out how long ago the surface was battered by impacts. Although amateurs have claimed to see flashes on the moon’s surface through backyard telescopes, serious astronomers dismissed many of the reports as stories from the lunatic fringe. “Not any more,” says […]
Cosmology in Crisis Over Dark Energy
May 21, 2008
Ten years ago, cosmologists invented dark energy to explain certain features of the expansion of the universe that could not be reconciled with observations of supernova magnitudes. Now, reported National Geographic News, dark energy remains the most profound problem in physics. It’s like theory and observations are refusing to cooperate with an arranged marriage. […]
Beware of Starstuff
May 19, 2008
Stars can be dangerous. They spew out deadly particles, unless you are protected from them in a safety bubble – like Earth has. The Earth’s magnetic field and atmosphere only let in the life-giving part of sunlight. Studies of other stars, and our own moon, show that things could be far worse. Record flare: A […]
Star Light, Star Bright, I Wish I Knew Whats Going On
May 16, 2008
Astronomy is fun, if for no other reason than it gives one endless opportunities to be shocked and surprised. Pulsar outside the box: Theory has it all laid out nice and neat. Pulsars form when a red giant drops matter onto a binary companion, making it go boom in a supernova, leaving behind a spinning […]
Earths Core Values Questioned
May 11, 2008
Geologists have long assumed that iron attracted certain elements toward the earth’s core during its formation. The amounts of them we find today were added by meteorites and comets as a veneer on the surface later. A press release from Florida State University is questioning those core values. New research “calls into question three decades […]
Iapetus Is Losing Its Dry Ice
May 5, 2008
How long can a moon afford to leak? Iapetus is losing its dry ice (carbon dioxide) through sublimation at a prodigious rate, say scientists in a paper in Icarus this month.1 “One can see that the long-term stability of CO2 is problematic.” Solving the mystery of the dark side on this mystery moon […]
First Galaxies Fast and Compact
May 3, 2008
The old picture: after the big bang, matter is diffuse. Out of the darkness, stars slowly begin to form, as the first galaxies take shape. Galaxies start out large and slowly grow more dense and structured over billions of years. The new picture: the first galaxies are very compact and dense, spinning rapidly, with stars […]