Category: Search for Life

A Home Next Door in Centauri Bb.

“The triple star system of Alpha Centauri is only 4.3 light-years — about 25 trillion miles — away. The possibility of an earth-like world orbiting our nearest neighbor has been a kind of holy grail of astronomy —- and something taken for granted by countless SciFi authors.”

Hey neighbor: Astronomers find an Earth-like planet just next door in Alpha Centauri, the nearest star system to our sun. “Indeed, Alpha Centauri Bb is the first planet with an earth-like mass ever found orbiting a sun-like star.” That being said, prospects for life — or colonization — seem, for the time being, remote. “Unfortunately for any hope of finding life on this world, it orbits only about four million miles away…This would make Alpha Centauri B more than twenty times larger in the planet’s sky than the sun is here on earth…and more than 500 times brighter and hotter.”

Titan’s Brew.

“‘Scientists previously thought that as we got closer to the surface of Titan, the moon’s atmospheric chemistry was basically inert and dull,’ said Murthy Gudipati, the paper’s lead author at JPL. ‘Our experiment shows that’s not true. The same kind of light that drives biological chemistry on Earth’s surface could also drive chemistry on Titan, even though Titan receives far less light from the sun and is much colder.'”

A NASA/JPL simulation of Titan’s atmosphere suggests a chaotic chemical brew conducive to life on Saturn’s most interesting moon. “Now we know that sunlight in the Titan lower atmosphere can kick-start more complex organic chemistry in liquids and solids rather than just in gases.” (Titan image via this 2011 post.)

The Worlds Next Door.

“‘We thought we would have to search vast distances to find an Earth-like planet. Now we realize another Earth is probably in our own backyard, waiting to be spotted,’ said Harvard astronomer and lead author Courtney Dressing.”

Data from Kepler’s Space Telescope suggests that an estimated 6% of red dwarf stars have planets in the habitable zone, meaning, statistically, we are basically surrounded by inhabitable worlds. “Our Sun is surrounded by a swarm of red dwarf stars. About 75 percent of the closest stars are red dwarfs.”

Martian Microbes and the Jovian Shield.

“Under the agency’s procedures, the box should not have been opened without knowledge of a NASA scientist who is responsible for guarding Mars against contamination from Earth. But Planetary Protection Officer Catharine Conley wasn’t consulted. ‘They shouldn’t have done it without telling me,’ she said. ‘It is not responsible for us not to follow our own rules.’“

It seems NASA’s Curiosity may have inadvertently brought Terran microbes along with it, which could become hugely significant if the robot encounters water, in which case they become either the potential seeds of new life on Mars and/or the 21st-century equivalent of the smallpox blanket. Er…oops.

Meanwhile, while we’re bringing life to Mars, Jupiter may have once again protected us from a Deep Impact/Melancholia-like disaster. “This is the third time since 2009 amateur astronomers have witnessed an impact flash on Jupiter. The massive gas giant, which exerts considerable gravitational pull, is something of a cosmic whipping boy in our solar system, regularly shielding inner planets like Earth from potential collisions.” So, if you’re keeping score at home, that’s Jupiter 3, Bruce Willis 1.

Spin Spin Sugar.

“In the disk of gas and dust surrounding this newly formed star, we found glycolaldehyde, which is a simple form of sugar, not much different to the sugar we put in coffee,” study lead author Jes Jørgensen, of the Niels Bohr Institute in Denmark, said in a statement. ‘This molecule is one of the ingredients in the formation of RNA, which — like DNA, to which it is related — is one of the building blocks of life.'”

The Land of Chocolate? Astronomers find sugar molecules orbiting young star IRAS 16293-2422, 400 light years away. “‘A big question is: how complex can these molecules become before they are incorporated into new planets?’ Jørgensen said. “This could tell us something about how life might arise elsewhere, and ALMA observations are going to be vital to unravel this mystery.'”

We have met the aliens…

“While testing the new spectrometer on the 20-meter last week, the astronomers aimed the telescope at Mars, as ya do, and found definitive proof of an intelligence at work in our Solar System[!!!]”

By way of Eric of Kestrel’s Nest, our radio telescopes find signs of life on Mars…us. Hey, at least the system works. Although, does anyone else have a problem with UNC-Chapel Hill calling their robotic telescope network SKYNET? Inviting calamity, I say.

Earth, you are On Notice.


“Yet across the gulf of space, minds that are to our minds as ours are to those of the beasts that perish, intellects vast and cool and unsympathetic, regarded this earth with envious eyes, and slowly and surely drew their plans against us. And early in the twenty-first century came the great disillusionment.“

And we know exactly whose fault it is. In response to the 35-year-old “WOW signal“, we the people of Earth have apparently chosen as our herald Stephen Colbert, whose response above will be broadcast in the direction of its origin by National Geographic via the Arecibo radio telescope.

Hrm….isn’t the Mighty Colbert a bit too droll for alien intelligences? I fear this will set off a Douglas Adams-style miscommunication that will end very badly for all parties involved. Second, why would any alien race be able to make sense of Prometheus? There was no sense there to be had.

Distant Mirrors, and a Devouring Hunger.


“‘This is a major milestone on the road to finding Earth’s twin,’ said Douglas Hudgins, a scientist with the Kepler program…Kepler-22b, located about 600 light years away, has a radius 2.4 times bigger than the Earth, making it the smallest planet ever found in the middle of the habitable zone around a star.” Among the several fascinating announcements in astronomy in recent weeks (including Hubble passing the 10,000th mission mark), scientists announce the discovery of a faraway habitable planet, Kepler-22b. “Scientists don’t yet know whether it is a rocky, gaseous or liquid-covered planet.” But, don’t worry — the Air Force has top men looking into the situation. Top…men.

Moreover, just today scientists announced the discovery of two Earth-sized planets — Kepler 20e and Kepler 20f. “‘For the first time, we’ve crossed the threshold of finding Earth-size worlds,’ Torres says. ‘The next step is having an Earth-size planet in the habitable zone.’” And apparently Kepler 20f may have once had water, not unlike a planet closer to home…

“This is the single most bullet-proof observation that I can think of that we’ve made this entire mission regarding the liquid water.” Something to consider if we don’t manage to tackle global warming by 2006 — the prior existence of water on Mars is further confirmed through a trail of gypsum left within an ancient rock. “Both the chemistry and the structure ‘just scream water,’ Squyres added.“

And, on a grander scale, astronomers have begun to uncover supermassive black holes (no, not those ones) at the centers of galaxies. These are “the biggest, baddest black holes yet found in the universe, abyssal yawns 10 times the size of our solar system into which billions of Suns have vanished like a guilty thought.” In other words, plenty of room for Maximillian Schell to get lost in there…Tread carefully.

Turn the Machines Back On!


“‘We’re not completely out of the woods yet, but everybody’s smiling here,’ the institute’s chief executive officer, Tom Pierson, told me today.” Also in good space exploration news, SETI’s Allen Telescope Array is now back online thanks to a wave of private donations. “Among the contributors are Jodie Foster…science-fiction writer Larry Niven…and Apollo 8 astronaut Bill Anders…’It is absolutely irresponsible of the human race not to be searching for evidence of extraterrestrial intelligence,’ Anders wrote in a note accompanying his contribution.“

The “Worms From Hell.”


“‘This is telling us something brand new,’ said Onstott, whose pioneering work in South Africa over the past decade has revolutionized the understanding of microbial life known generally as extremophiles, which live in places long believed to be uninhabitable. ‘For a relatively complex creature like a nematode to penetrate that deep is simply remarkable.‘”

From a few weeks ago and languishing in the bookmarks, scientists find nematodes a mile below the Earth’s surface, raising the possibility of similar life on other worlds. The spice must flow… “The two lead researchers…said the discovery of creatures so far below ground, with nervous, digestive and reproductive systems, was akin to finding ‘Moby Dick in Lake Ontario.‘”