Snowing Microbes

Of all the places in our solar system (besides Earth) that are most likely to harbor life, none is better than Enceladus, Sat­urn’s sixth largest moon. Although extremely cold, it has been recording spouting geyser-like plumes of liquid water high into the air. Enceladus is one of only a few other places in our solar system with recorded geologic activity.

Although it is so very cold on Enceladus, that does not have researchers worried, because we have life here in our arctic oceans on Earth.

The lucky thing about the water being sprayed into the air also means that the probes that have been sent to Enceladus do not even need to land! All they have to do is fly through the spray to gather their samples and analyze the liquid. With the envi­ronment being so cold, however, all of the spray is probably being frozen into snow in the atmosphere. 
There are also concerns that perhaps the oceans are far too acidic to support life, but again, it may be possible for mi­crobes to survive in such conditions.

Microbes, are, in fact, what the researchers are looking for; millions of microscopic bacteria and other organisms that live just about everywhere here on Earth. As the water is likely being spurted from the oceans beneath the frozen surface of the planet, any life held within them would be blown up into the atmosphere in the geysers.

Read more from SPACE.com.

Life on Europa: a soda ocean? 03.02.12

Of all of the other places in our solar system, one of the most promising locations for extraterrestrial life has been Jupiter’s icy moon Europa. Completely covered with ice on the surface, researchers believe Europa harbors an ocean of liquid water at least 100 miles deep, which leads down to a rocky interior and a solid core of some type, most likely metal. Surface studies on the moon have yet to be conducted, however, so the re­searchers have no idea how thick the icy crust on the outside of the planet may be.

Credit: NASA.

While the possibility of an ocean of liquid water is more than enough to be excited about, some researchers are beginning to doubt whether or not life as we know it would be able to thrive on the chilling planet. What research has been done on the planet is beginning to lead the scientists to believe that whatever water is there would be highly contaminated by extremely acidic chemicals. There is some speculation that it is possible the acidity could be balanced out by more basal minerals at the ocean floor, but again, it is all speculation.

There are a few places on Earth where some microbes and other life forms thrive in highly acidic environments, but those areas are few and far between. So, the likelihood of life sur­viving on an entire planet like that? Very slim.

Without the bases and minerals at the ocean floor to balance out the pH, though, the researchers say the ocean would have moderately corrosive characteristics, “about the same as your average soft drink,” except it would be more along the lines of hydrogen peroxide than a cola. Swim time, anyone?

Information credit: SPACE.com.

Phobos-Grunt a failure, 12.16.11

Russian aerospace company NPO Lavochkin is expected to make the announcement soon that Phobos-Grunt, an unmanned probe mission to Mars, has failed. The probe launched early last month and its last booster rocket failed to go off, leaving the probe stuck in Earth orbit with a full tank of fuel.

Image credit: thespacereview.com.

The probe’s intended destination was the red planet’s moon Phobos. Its mission was to collect rock and soil samples.

The probe launched early on November 8 of this year. All seemed to be well as it reached Earth orbit, but the last booster rocket failed to fire, which would have propelled the probe out of orbit and on track towards Phobos. Repeated contact attempts have been made to make the last booster rocket fire, but it failed to respond. In its current state, the probe is too dangerous to approach with another vessel to repair it, so the mission is a bust.

Russian officials claim the probe should not pose a threat to humans when it descends to Earth, and say most of it should burn up as it falls.

Information credit: SPACE.com.

The sky is falling! 08.15.11

*UPDATE: NASA is now saying that they expect UARS to make impact at some point late tonight or early tomorrow morning. While it is impossible to pinpoint its exact crash site now, they estimate it will be somewhere off the coast of the Philippines. For NASA’s information about the UARS mission, visit: http://www.nasa.gov/mission_pages/uars/index.html.


The sky is falling! Well, not exactly. Something in the sky is falling, though. A 13,000-pound research satellite, to be precise. The word from NASA is to keep an eye out for falling debris.

UARS. Image credit: SPACE.com.

UARS, or the Upper Atmosphere Research Satellite, has said its farewells to space and will be returning to Earth. NASA is slightly nervous about the giant research satellite, though, because it will be a true free-fall back to earth. What is more: they have no idea where the pieces that survive re-entry back into earth’s atmosphere will land.


According to NASA, they estimate about 1,000 pounds of the satellite will crash back into Earth, but will probably break up in the atmosphere and descend in a rain of debris that could cover an area about 500 miles in length.


As of right now, they cannot predict where or even when the remains of the satellite should make it back to Earth, but should be able to begin calculating it’s projected landfall about four days before it lands. They estimate it should be “landing” at the end of this month, or in early October. As it becomes closer and closer to Earth, they will attempt to give proper warning about the projected landing area.


According to NASA, no injuries have ever been reported due to re-entering space program equipment, and only minor property damage has ever been reported.


Just the same, we recommend keeping your eyes and ears open just in case UARS decides to land near you.


Credit: SPACE.com.

Packing power, 09.07.11

NASA is working on a power source that could revolutionize space exploration. A nuclear reactor the size of a regular suitcase, it is strong enough to power eight average US homes, yet portable enough to travel in small, compact space craft. Designed by scientists at the U.S. Department of Energy’s Idaho National Laboratory, the generator is not actually in production yet, but given that its true value is proven, it could be venturing outside Earth’s atmosphere in a few decades or less.

A concept lunar space station. Image credit: SPACE.com.

So, what could such a generator be used for? More dependable that solar power panels, the generators would be smaller, more durable, much easier to repair, and portable. They could be used on the “dark side” of whatever planet they happened to be stationed on (yes, we are dreaming about space stations on the Moon or Mars). They would also generate far more power than a solar cell of comparable size.

Wait a minute, what about nuclear meltdown? In light of disasters light Chernobyl and the recent leaks in earthquake and tsunami-wrecked Japan, would we really want to rely on nuclear reactors? Well, it turns out the suitcase-sized reactors would be much more stable than the monster, factory-sized reactors located throughout our nation and across the world. According to James Werner, the lead researcher on the project, “There would be no danger of meltdown… Because of the low power level…if we did have a situation where the power failed, the reactor itself would just shut down.”

Of course, one also has to take into consideration what sort of waste these things would generate, how often they would have to be refueled, and more. But, in light of the massive boost in exploration power they could provide (pun intended), such details seem to be exactly that: details. For now, researches are bent on thorough testing to see if these power packs are viable options.

Credit: SPACE.com.

Dwarf planets' fifth birthday, 08.25.11

Five years ago yesterday, the International Astronomical Union demoted Pluto to its “dwarf planet” classification. Here at the Wetherbee Planetarium, that is the single most-heard question we are asked: why? Was something discovered about Pluto that made astronomers second-guess it? Did something happen to it? Not at all. It is the other things around Pluto that made the IAU change their minds about what they classify as a planet, though.

As of August 24, 2006, the definition of a planet by the IAU is: “A body that circles the sun without being some other object’s satellite, is large enough to be rounded by its own gravity (but not so big that it begins to undergo nuclear fusion, like a star) and has “cleared its neighborhood” of most other orbiting bodies.” On the first point, Pluto does orbit the sun. On the second point, as far as we can tell it is relatively round in shape. When NASA’s New Horizons probe cruises by in 2015 we will have close up images of the cold planet for the first time in history and we will know for sure what it is like. On the last point, however, Pluto is not exactly a space hog. It rubs elbows –figuratively speaking—with several other objects in our solar system in a region designated as the Kuiper (pronounced ky-per) Belt, some of which are about the same size as Pluto. 

Pluto is only about 1,455 miles in diameter and only 0.2% as massive as Earth. It is tiny, that much is certain. But, it does have at least four known moons: Charon, Nix, Hydra, and the recently discovered P4 (a dismally boring name, we know—NASA presumes will probably be renamed Cerberus in the near future). In orbit around the sun with Pluto are several other objects about the same size as or smaller. Eris is one such object, and was the turning point discovery that led the IAU to re-think their definition of a planet. Another is Haumea, the rapidly spinning dwarf planet that astronomers guess may have radioactive elements in its core. Another is Makemake (pronounced mah-kay mah-kay), a dwarf planet about ¾ the size of Pluto.

Dwarf planets are not just limited to the Kuiper Belt, though. Ceres, another such object, is actually orbiting in our asteroid belt, between the planets Mars and Jupiter.

Each of these objects misses the criteria for a planet in some way, usually in clearing its neighborhood of other objects. They are massive enough to form into relatively spherical shapes and they do orbit the sun, they just usually are not really big enough to push their way through the crowd and clear their own path.

Credit: NASA.