SETI Blurs Line with Hollywood
August 18, 2011
Down again, up again; the SETI Institute got a reprieve for its Allen Telescope Array from actress Jodie Foster, star of the Sagan SETI saga Contact. And just in time; NASA needs contact to protect earth from aliens who might invade to punish us for global warming.
Earth Uniqueness Up; SETI Down
July 29, 2011
Our earth seems special – maybe because it is. Some astronomers are seriously considering that life might be rare or unique on our rare (or unique) planet. If so, hopes for finding sentient aliens on the celestial radio dial drop accordingly. The 50th anniversary of the first SETI search came, unfortunately for search enthusiasts, came at a time when funding is harder to get.
July 29, 2011
Eruptions can come in two types: literal and figurative. Some planetary bodies are literally erupting. Others are causing figurative eruptions in theories. Here are some recent news stories about planets, moons, comets and other objects circling our sun and other stars. There hasn’t been much news from Mercury or Venus this month, so we’ll start on the home planet and work outward.
Water, Water Everywhere in Space
July 23, 2011
The largest mass of water has been found surrounding a black hole in a quasar 12 billion light-years away. Space.com says the cloud harbors “140 trillion times more water than all of Earth’s oceans combined.” The discovery not only that “water has been prevalent in the universe for nearly its entire existence,” but that it “was present only some 1.6 billion years after the beginning of the universe.” Alberto Bolatto, of the University of Maryland, said, "This discovery pushes the detection of water one billion years closer to the Big Bang than any previous find.”
In other cosmology news:
Cosmology Could Be Way Off
June 17, 2011
The “lumpiness problem” in cosmology refuses to go away. This old conundrum about why the universe is lumpy with stars and galaxies has been around for decades. The big bang predicts no such lumps. Since the late 1990s, tiny differences in temperature measured in the cosmic background radiation held hope of being the seeds of lump formation, provided theories added copious fudge factors like dark matter, dark energy and inflation. A new survey finds more clumps than expected, casting doubt on whether the fudge factors are wrong, the hot big bang is wrong, or relativity is wrong. Words can hardly express the gravity of the situation when gravity itself – an icon of scientific verity – is called into question.
Spiral Galaxy Upset
May 4, 2011
In 1964, C. C. Lin and Frank Shu looked at the galaxy’s curvaceous arms and said, “You are my density.” The density-wave theory of spiral arm formation was married to galactic astronomy for nearly a half century. Now, however, we are back to the future, where theories do not always fulfill their destiny. An upstart […]
Upsets in Space
April 18, 2011
Three different astronomy teams have announced findings that upset long-held beliefs. What does this portend about the confidence we can have in other theories? Galaxy growth: direct challenge: “Galaxies are thought to develop by the gravitational attraction between and merger of smaller ‘sub-galaxies’, a process that standard cosmological ideas suggest should be ongoing,” announced the […]