Press Releases 2013

9 Diciembre 2013: Stars come in a tremendous size range, from many tens of times bigger than the Sun to a tiny fraction of its size. But the answer to just how small an astronomical body can be, and still be a star, has never been known. What is known is that objects below this limit are unable to ignite and sustain hydrogen fusion in their cores: these objects are referred to as brown dwarfs.

26 Noviembre 2013: Gemini observations support an unexpected discovery in the galaxy Messier 101. A relatively small black hole (20-30 times the mass of our Sun) can sustain a hugely voracious appetite while consuming material in an efficient and tidy manner – something previously thought impossible. The research also affects the long quest for elusive intermediate-mass black holes. The findings are published in the November 28, 2013, issue of the journal Nature.

3 Septiembre 2013: Tonight, as the sun sinks below the horizon, the world’s most powerful digital camera will once again turn its gleaming eye skyward. Tonight, and for hundreds of nights over the next five years, a team of physicists and astronomers from around the globe, working from an observatory in Chile, will use this remarkable machine to try to answer some of the most fundamental questions about our universe.

9 Agosto 2013: “Celestial Pollution” from meteors like this weekend’s Perseid Meteor Shower sprinkle sodium high up in our atmosphere and give astronomers what they need to see the universe in much greater detail.

6 Agosto 2013: Gemini Observatory’s latest instrument, a powerful infrared camera and spectrograph at Gemini South, reveals its potential in a series of striking on-sky commissioning images released today.

25 Julio 2013: The Whirlpool Galaxy (Messier 51) has been a popular night sky target for astronomers for centuries. Charles Messier first identified it in 1773 and listed it as number 51 in his catalog. To him, it looked like a faint, fuzzy object that might be a comet. William Parsons, the 3rd Earl of Rosse, used his 72-inch telescope “Leviathan” to observe the Whirlpool in 1845. Since then, Messier 51 has likely been targeted by virtually every telescope in the northern hemisphere. It is found in the constellation Canes Venatici (the Hunting Dogs) and is a classic example of a spiral galaxy.

2 Julio 2013: A unique new instrument at Gemini South in Chile takes the removal of atmospheric distortions (using adaptive optics technology) to a new level. Today’s release of seven ultrasharp, large-field images from the instrument’s first science observations demonstrate its remarkable discovery potential.

27 Junio 2013: Gemini Observatory’s Planet-Finding Campaign finds that, around many types of stars, distant gas-giant planets are rare and prefer to cling close to their parent stars. The impact on theories of planetary formation could be significant.

5 Junio 2013: Stars are known to form in dense clouds of gas and dust, but why do some regions show prodigious rates of star formation, while others barely produce any young stars at all? Many of the richest sites are found in distant galaxies: the name “starburst” is applied to them. Now, a team has identified a region in our own galaxy that may deserve this title, and help explain what leads to the furious production of new stars in a starburst region.

4 Junio 2013: Using the new wide-field camera at the WIYN 3.5 meter telescope, astronomers have found that the peculiar asteroid P/2010 A2's tail is much longer than previously supposed. The tail is about a million km long, roughly three times the distance from the earth to the moon.

4 Junio 2013: In a new study using the NOAO Kitt Peak National Observatory Mayall 4-meter telescope, observations of a large sample of stars with candidate planets identified by the NASA Kepler Mission have revealed that many of the stars, and hence their planets, are actually somewhat larger than originally thought. In addition, the researchers confirm that planets larger than Neptune are more likely to be found orbiting stars that contain more heavy elements (such as iron) than the Sun. Small planets, however, have been discovered around stars both rich and poor in metals.

29 Mayo 2013: Images of Comet ISON over the past three months hint at coming changes as comet speeds into the inner solar system.

13 Mayo 2013: For centuries, humans have pondered what life on other planets beyond our solar system might be like. With the launch of the Kepler Spacecraft in 2009 we now have evidence for the widespread existence of such planets. Kepler’s discovery of hundreds of planet candidates around other stars has inspired a new book that combines both science and science fiction: A Kepler’s Dozen: Thirteen Stories about Distant Worlds that Really Exist. This anthology is co-edited by David Lee Summers (author of The Pirates of Sufiro and editor of Space Pirates) and Dr. Steve Howell (Kepler Project Scientist). (Fig. 1)

30 Abril 2013: Astronomers at the Southern Astrophysical Research (SOAR) Telescope and the Cerro Tololo Inter-American Observatory (CTIO) have demonstrated the significant difference that sharp stellar images can make in our understanding of the properties of stars. They have observed the globular cluster NGC 6496 using a new instrument dubbed SAM, for SOAR Adaptive Module, which creates an artificial laser guide star. SAM, built by CTIO/NOAO-S, is mounted on the SOAR 4.1 meter telescope.

1 Abril 2013: Watching starbirth isn’t easy: tens of millions of years are needed to form a star like our Sun. Much like archeologists who reconstruct ancient cities from shards of debris strewn over time, astronomers must reconstruct the birth process of stars indirectly, by observing stars in different stages of the process and inferring the changes that take place. Studies show that half of the common stars, including our Sun, formed in massive clusters, rich with young stars, from which they eventually escape. As part of his PhD thesis work, Thomas Allen, University of Toledo, has been observing such a region where stars are forming.

8 Marzo 2013: A pair of newly discovered stars is the third-closest star system to the Sun, according to a paper that will be published in Astrophysical Journal Letters. The duo is the closest star system discovered since 1916. The discovery was made by Kevin Luhman, an associate professor of astronomy and astrophysics at Penn State University and a researcher in Penn State's Center for Exoplanets and Habitable Worlds.

18 Febrero 2013: On February 15, asteroid 2012 DA14 passed extraordinarily close to the earth. Unlike the unexpected asteroid collision over Russia that day, this encounter never presented any danger but astronomers were eager to observe the event. An international team led by Nicholas Moskovitz (MIT) observed the asteroid with a number of telescopes, including the 2.1m telescope at Kitt Peak National Observatory: the accompanying video shows the asteroid as it was leaving the vicinity of the earth. As Dr. Moskovitz said, “Flybys like this, particularly for objects smaller than 2012 DA14, are not uncommon. This one was special because we knew about it well in advance so that observations could be planned to look at how asteroids are effected by the Earth’s gravity when they come so close.” In this movie, the asteroid is seen moving across a field about one third the size of the full moon in about 45 minutes. The field is located in the constellation of the Little Dipper: north is to the left and east is down.

12 Febrero 2013: This image of a planetary nebula, which may suggest a rose to some, was obtained with the wide-field view of the National Optical Astronomy Observatory (NOAO) Mosaic 1 camera on the Mayall 4-meter telescope at Kitt Peak National Observatory.

8 Enero 2013: A new image released today reveals how Gemini Observatory's most advanced adaptive optics (AO) system will help astronomers study the universe with an unprecedented level of clarity and detail by removing distortions due to the Earth’s atmosphere. The photo, featuring an area on the outskirts of the famous Orion Nebula, illustrates the instrument's significant advancements over previous-generation AO systems.