CreditCalifornia Institute of Techonology
We might be half-way through 2015 but there are still 7 upcoming stargazing events that you won’t want to miss.
Carl Sagan once proposed the idea of sailing through the cosmos via a solar-powered spacecraft. This spaceship would use sunlight radiation to power its flight much like a boat uses the wind for propellant. On May 20th, the Sagan co-founded Planetary Society will initiate its first test flight for such a solar vehicle: the LightSail.
North America is predicted to have the best view of a possible new meteor shower from Comet 209P/LINEAR Friday night through Saturday morning (May 23-24, 2014). (Deborah Boyd-EarthSky)
Meteors from the May 24th’s early-morning display can appear anywhere in the sky, but they will appear to originate from a point (called the radiant) in the constellation Camelopardalis, the Giraffe. Stars are plotted for 2 a.m. local daylight time as seen from mid-northern latitudes. Sky & Telescope illustration.
Cosmic Inflation now has the ‘smoking gun’.
“The minuscule ripples in space-time are the last prediction of Albert Einstein’s 1916 general theory of relativity to be verified. Until now, there has only been circumstantial evidence of their existence. The discovery also provides a deep connection between general relativity and quantum mechanics, another central pillar of physics.”(Stuart Clark)
Scientists, from left, Clem Pryke, Jamie Bock, Chao-Lin Kuo and John Kovac smile during a news conference at the Harvard-Smithsonian Center for Astrophysics in Cambridge, Mass., on March 17, 2014.
The measurements were taken using the BICEP2 instrument at the South Pole Telescope facility. Now we wait as the scientific community deliberates these findings and maybe, just maybe, we have confirmed more of Einstein’s brilliance.
(Credit: NASA/JPL/Ted Stryk)
On March 4, 2014 Charles Bolden, NASA Administrator, released a statement which includes, “In the coming year, we’ll build on our nation’s record of breathtaking and compelling scientific discoveries and achievements in space, with science missions that will reach far into our solar system, reveal unknown aspects of our universe and provide critical knowledge about our home planet. It includes funding for missions to Mars and the formulation for a mission to Jupiter’s moon, Europa.”
It looks as though we may finally go to a ‘local’ body that will hold many surprises and in astronomical distances Europa is so very close.
Europa is just begging us to visit and the Europa Clipper is one mission.
This artist’s impression of Europa makes the place look more exotic than Mars.
(Credit: Chris Weeks)
With the crazy winter weather warnings today in south Louisiana and even school cancellations for tomorrow, I thought it was an interesting time to find out that the dwarf planet Ceres has an icy surface also. With the help of the Herschel space observatory, scientists have detected an icy surface on the only dwarf planet that resides in the asteroid belt. It was previously suspected that ice existed on Ceres but it had not been conclusively detected until now. Plumes of water vapor are thought to shoot up from Ceres when portions of its icy surface warm slightly. This happens in the portion of the dwarf planet’s orbit that takes it closest to the sun. This is a surprise because, while comets are known to have water jets and plumes, objects in the asteroid belt are not. They also believe that if the ice in the interior of Ceres melted, there would be more fresh water than exists on all of Earth!
Ceres is smaller than a planet but, considering it’s the largest object in the asteroid belt, is obviously larger than an asteroid. When first discovered, Ceres was thought to be a comet, then a planet and of course at some point an asteroid. In 2006, The International Astronomical Union reclassified Ceres as a dwarf planet.
Artist’s impression of the Rosetta orbiter deploying the Philae lander to comet 67P/Churyumov–Gerasimenko. After an extensive mapping phase by the orbiter in August–September 2014, a landing site will be selected for Philae to conduct in situ measurements in November 2014. The image is not to scale; the Rosetta spacecraft measures 32 m across including the solar arrays, while the comet nucleus is thought to be about 4 km wide. (Photo: ESA)
Scientists at the European Space Agency (ESA) sounded Rosetta’s internal alarm clock to reboot the mission after two-and-a-half years of deep space slumber. Once its systems warm up, Rosetta is due to beam a signal back to Earth before it begins to home in on a frozen rock known as 67P/Churyumov-Gerasimenko. It is due to shoot harpoons into the 2.5-mile dirtball before its Philae lander docks on the surface – a move that has never been attempted before.
ESA project scientist Matt Taylor likened the mission to that of the action film Armageddon, in which Bruce Willis lands on an asteroid to save the world from destruction. “We’re not just landing on the Moon, we’re dealing with something dynamic, which is kicking off tons of dust and gas every minute,” he told the Sunday Telegraph. Because Rosetta, which has been sleeping to save power, is so far from Earth, it will take 45 minutes for its signal to reach scientists at mission control. They expect to see a blip on computer monitors between 1730 and 1830 GMT, indicating the spacecraft is up and running again.
Dr. Dan Andrews, a planetary scientist at the Open University in Milton Keynes, said: “We’re waiting to hear Rosetta is alive and healthy. “This wake-up call kicks off a chain of events, during which the spacecraft heats itself up, points itself towards the Sun and gets itself ready. “Remember, this mission is 10 years old – it’s a bit of a stroppy teenager and it’s going to take a while to wake up.” If all goes to plan, Rosetta will arrive at Churyumov-Gerasimenko in August before descending to the comet several months later.
Orion, the hunter, is one of the most popular constellations in the night sky; so you may have already seen him this winter or in late fall. Throughout the year, no matter the season, when I am in schools with our Discovery Dome portable planetarium someone often asks me to point out Orion. The mighty hunter is also one of the largest and easiest constellations to find. Most people find it by locating the three stars that make up Orion’s “belt” which is an asterism or recognizable group of stars that are part of a constellation. The names of the three stars that make up Orion’s belt are Alnitak, Alnilam and Minatka. One of the brightest stars in the sky is on Orion’s right shoulder. It’s called Betelgeuse.
Orion’s belt is the only group of three stars that are spaced so evenly making them very easy to recognize. Once you have found the belt, the hunter easily pops into view especially when it is right overhead during the cold evenings of winter.
Besides being easy to spot, the constellation Orion is also where you will find one of the most beautiful objects in the night sky, the Orion Nebula. Count down to the third bright object in Orion’s sword and you will find not a star but the Orion Nebula. With binoculars focused on this object, you will find many stars rather than one.
So the next time you look for Orion in the night sky be sure to also take a look at the third object in his sword for the giant cloud of gas and dust that makes up this birthplace or stars and solar systems.
The Geminid Meteor shower occurs each December, and this year we can expect to see up to 50 meteors each hour. Check out this awesome timelapse that I wish I could say I did, but someone else made it…. This timelapse was taken of the Geminids last year over the Pacific Coast.
Meteor showers are caused when Earth passes through the orbital path of a comet, the debris left behind by the comet falls into Earth’s atmosphere creating many shooting stars. The Geminid shower is different. Scientists have determined that this shower occurs when Earth passes through a debris field of an asteroid. This asteroid is called 3200 Phaethon. Observations show that this object is strange indeed, and sometimes behaves similar to a comet. Its orbit brings it in close to the Sun, and then back out again. Jets of dust and gas have been seen spewing from the asteroid at times. Tiny pieces of dust and rock are left behind by 3200 Phaethon as it travels through space, and these cause the Geminid Meteor Shower. The tiny arrows in the image below point to 3200 Phaethon, this image was created by combining multiple images over the span of 20 minutes to show the asteroid’s movement relative to the background stars.
Meteor showers are named for constellation that their radiant lies in. The radiant is the point from which the meteors appear to radiate from in the sky. The constellation Gemini will rise above the horizon around 9 PM Central Time tonight (December 13th). It will be nearly overhead around 2 AM. This year the moon will also be visible in the sky, which will make it more difficult to see the fainter meteors.
While Baton Rouge forecasts are saying rain throughout this evening, some reports indicate that the sky will clear a bit after midnight. Incidentally this is the best time to go out and find meteors! Meteor watching requires patience and sharp eyes, each year the number of meteors changes. Happy viewing!