December 2011
7 posts
Anonymous asked: how is a white hole created
5 tags
Variable dark energy could explain old galaxy...
Does dark energy change over time? An alternative model of the as yet undetected entity that is thought to be accelerating the universe’s expansion could explain some puzzling observations of galaxy clusters. But it will have to jump many more hurdles to compete with the simplest and so far most successful model of the elusive entity.
That model, called the cosmological constant, holds...
4 tags
Jupiter's heart is dissolving
Even the mighty can lose heart. New calculations suggest that Jupiter’s rocky core is dissolving like an antacid tablet plopped in water.
The work could help explain why its core appears smaller and its atmosphere richer in heavy elements than predicted.
Giant planets like Jupiter and Saturn are thought to have begun their lives as solid bodies of rock and ice. When they grew to about...
4 tags
Stopped clocks deepen pulsar enigmas
What: Pulsar Distance: 23,000 light years away
In 1967, suspiciously regular pulses of radiation were detected coming from space – so regular that their discoverers thought they could be signals from an alien civilisation. That hypothesis was soon abandoned and the source was named a pulsar, or pulsing star. Since then, the metronomic emissions of gamma rays, X-rays or radio waves from...
“We must convince each generation that they are transient passengers on this...”
– Bernard Lown and Evjueni Chazov (Peace: A Dream Unfolding)
3 tags
“It is as if we are standing in a cave holding a candle; the flame barely...”
– David Suzuki (Homo sapiens: Born of the Earth)
