با سلام بنده عليرضا وكيلي براي شما در اين وبلاگ امكانات و اطلاعات تخصصي درباره موضوعات روانشناسي،انگليسي،اخبار به روز و ...فراهم آورده ام لطفا نظرات و انتقادات و پيشنهاد هاي خود را بهalirezabook1377@yahoo.com ارسال كنيد.
تبادل
لینک هوشمند
برای تبادل
لینک ابتدا ما
را با عنوان
آنلاين ويد اس
و آدرس
onlinewithus.LXB.ir لینک
نمایید سپس
مشخصات لینک
خود را در زیر
نوشته . در صورت
وجود لینک ما در
سایت شما
لینکتان به طور
خودکار در سایت
ما قرار میگیرد.
Cast Your Vote to Name Pluto's Two Newest Moons Posted by Guy Pirro on 2/18/2013 6:44 PM
Images taken by the Hubble Space Telescope in 2011 and 2012 revealed two previously unknown moons of Pluto. So far, the moons are referred to as P4 and P5, but the time has come to give them permanent names. By tradition, the names of Pluto's moons come from Greek and Roman mythology and are related to the ancient tales about Hades and the Underworld. The P4/P5 Discovery Team will be proposing names for the two new moons to the International Astronomical Union (IAU), and is asking for your help in making the selections. An online poll has been set-up by the SETI Institute and Dr. Mark Showalter on behalf of the P4/P5 Discovery Team and they are requesting your input. There are twenty one candidate names, so pick your favorites on the online ballot. The top five choices so far are Vulcan, Cerberus, Styx, Persephone, and Orpheus. Voting ends at noon EST on Monday February 25, 2013.
Sunday, February 10, 2013
NASA's OSIRIS-REx Spacecraft Targets Near-Earth Asteroid Posted by Guy Pirro on 2/10/2013 3:57 PM
According to NASA's Near Earth Objects (NEO) program, there are more than 1,300 Potentially Hazardous Asteroids(PHAs) with at least a very small chance of impacting us someday. Anything over 150 yards across that appears to be on a potential collision course with Earth at some time in the future is very worrisome. But the main difficulty in making predictions is in obtaining sufficient observations to determine the orbits of the PHAs. Scheduled for launch in 2016, NASA's OSIRIS-REx mission will make precise measurements of one potentially dangerous PHA called 1999 RQ36. OSIRIS-REx will arrive at RQ36 in 2018 and orbit the asteroid until 2021, all the while getting a much better view of subtle changes in the asteroid's orbit. As an added bonus, the spacecraft will collect a sample and return it to Earth.
Tuesday, February 05, 2013
Amateurs team with Hubble to produce extraordinary image Posted by Paul Walsh on 2/5/2013 3:48 PM
Working with astronomical image processors at the Space Telescope Science
Institute in Baltimore, Md., renowned astrophotographer Robert Gendler has
taken science data from the Hubble Space Telescope (HST) archive and
combined it with his own ground-based observations to assemble a photo
illustration of the magnificent spiral galaxy M106.
|
Sunday, February 03, 2013
Talk About a Close Shave -- Asteroid to Pass Very Close to the Earth Posted by Guy Pirro on 2/3/2013 7:21 AM
Talk about a close shave. On February 15, 2013, an asteroid about half the size of a football field will fly past Earth only 17,200 miles above our planet's surface. This is so close that the asteroid will actually pass inside the ring of geosynchronous satellites, which is located about 35,800 kilometers (22,200 miles) above the equator. There's no danger of a collision, but the space rock, designated 2012 DA14, has NASA's attention.
Thursday, January 24, 2013
At Least One in Six Stars Has an Earth-sized Planet Posted by Guy Pirro on 1/24/2013 5:13 PM
Using NASA's Kepler spacecraft, astronomers are beginning to find Earth-sized planets orbiting distant stars. Kepler detects planetary candidates using the transit method, watching for a planet to cross a star and create a mini-eclipse that dims the star slightly. A new analysis of Kepler data shows that about 17 percent of stars have an Earth-sized planet in orbit. Since the Milky Way has about 100 billion stars, there are at least 17 billion Earth-sized worlds out there. |
Friday, January 18, 2013
Large Quasar Group is the Largest Structure in the Universe to Date Posted by Guy Pirro on 1/18/2013 11:12 AM
Quasars are galaxies from the early days of the universe that undergo brief periods of extremely high brightness, making them visible across huge distances. Since 1982 it has been know that quasars tend to group together in clumps or structures of surprisingly large size, forming Large Quasar Groups or LQGs. A team of astronomers at the University of Central Lancashire in the UK has announced the discovery of a 4 billion light year-wide Large Quasar Group. This is significant because the LQG is so large that it puts Einstein's Cosmological Principle into question.| |
Sunday, January 13, 2013
ALMA Shows How Young Stars and Planets Grow Simultaneously Posted by Guy Pirro on 1/13/2013 6:43 PM
Astronomers have used the ALMA telescope in Chile to get their first glimpse of a fascinating stage of star formation in which planets forming around a young star are helping the star itself continue to grow, resolving a longstanding mystery. The young system, about 450 light-years from Earth, is revealing its complex gravitational dance to the ever-sharpening vision of the Atacama Large Millimeter/submillimeter Array (ALMA).
Friday, January 04, 2013
Vast Petroleum Reservoirs Discovered in the Horsehead Nebula Posted by Guy Pirro on 1/4/2013 7:01 AM
The Horsehead Nebula, 1,300 light years from Earth, is located in the Orion constellation, which will become more visible in the night skies over the next few weeks. Due to its famous and easily recognizable shape, the Horsehead Nebula is one of the most photographed objects by astronomers. But the nebula is also a fantastic interstellar chemistry lab where high density gas and intense stellar light continuously interact and trigger many-layered chemical reactions. Using the 30 meter radio telescope of the Institute for Radio Astronomy near Pico del Veleta in the Spanish Sierra Nevada, astronomers have detected the interstellar molecule C3H+. The molecule belongs to the hydrocarbon family and a major energy resource of our planet -- petroleum and natural gas. |l ... |
Hubble Team Releases a New Extreme Deep Field Image Posted by Guy Pirro on 12/20/2012 4:17 PM
The Hubble Team has assembled a new, improved portrait of mankind's deepest-ever view of the universe. Called the eXtreme Deep Field, or XDF, the photo was assembled by combining 10 years of NASA Hubble Space Telescope photographs taken of a patch of sky at the center of the original Hubble Ultra Deep Field. The new full-color XDF image reaches faint galaxies and includes very deep exposures in red light from Hubble's new infrared camera and shows about 5,500 galaxies. The universe is 13.7 billion years old and the XDF reveals galaxies that span back 13.2 billion years in time.
| Read full story | 0 Comments... |
Wednesday, December 12, 2012
NASA-NOAA Satellite Reveals Stunning Views of Earth at Night Posted by Guy Pirro on 12/12/2012 8:32 PM
Scientists unveiled an unprecedented new look at our planet at night. A global composite image, constructed using cloud-free night images from a new NASA and National Oceanic and Atmospheric Administration (NOAA) satellite, shows the glow of natural and human-built phenomena across the planet in greater detail than ever before. Unlike a camera that captures a picture in one exposure, this satellite produces an image by repeatedly scanning a scene and resolving it as millions of individual pixels. The instrument can capture images on nights with or without moonlight, producing crisp views of Earth's atmosphere, land, and ocean surfaces.
| Read full story | 5 Comments... |
Friday, December 07, 2012
Lost in Space -- Giant Orphan Planet Hurtles Through Space Without a Parent Star Posted by Guy Pirro on 12/7/2012 7:05 PM
Astronomers using ESO's Very Large Telescope and the Canada-France-Hawaii Telescope have identified a body that is very probably a planet wandering through space without a parent star. This is the most exciting free-floating planet candidate so far and the closest such object to the Solar System at a distance of about 100 light-years. Its comparative proximity and the absence of a bright star very close to it, has allowed researchers to study its atmosphere in great detail.
| Read full story | 0 Comments... |
Sunday, December 02, 2012
Hobby-Eberly Telescope Finds a Massive Black Hole That is 4 Light Days in Diameter Posted by Guy Pirro on 12/2/2012 9:11 PM
Astronomers at The University of Texas at Austin's McDonald Observatory have measured the mass of what may be the most massive black hole yet - 17 billion Suns - in galaxy NGC 1277. The unusual black hole, which is 4 light days in diameter, makes up 14 percent of its galaxy's mass, rather than the usual 0.1 percent. This galaxy could change theories of how black holes and galaxies form and evolve.
ESA's Planck Space Telescope Spots Colossal Intergalactic Bridge Posted by Guy Pirro on 11/27/2012 4:48 PM
The Planck space telescope has made the first conclusive detection of a bridge of hot gas connecting a pair of galaxy clusters across 10 million light-years of intergalactic space. In the early Universe, filaments of gaseous matter pervaded the cosmos in a giant web, with clusters eventually forming in the densest nodes. However, much of this tenuous, filamentary gas remains undetected. The presence of hot gas between the clusters was first hinted at in X-ray data from ESA's XMM-Newton and the new Planck data confirms the observation.
| Read full story | 0 Comments... |
Big News From Mars? Curiosity Rover Scientists are Mum For Now Posted by Guy Pirro on 11/21/2012 5:24 PM
According to Joe Palca of NPR, Scientists working on NASA's Curiosity rover have some exciting new results from one of the rover's instruments. However, they'll have to wait before making an announcement because they want to make sure their results are true. Is this going to be one for the history books or just a false alarm? For now, we'll have to wait to see. In time we'll find out what's got the Mars rover scientists so excited.
Max Planck Scientists Use NASA's Fermi to Discover Record-Breaking Millisecond Pulsar Posted by Guy Pirro on 11/13/2012 8:36 PM
Pulsars are the compact remnants from explosions of massive stars. Some of them spin around their own axis hundreds of times per second, emitting beams of radiation into space. Until now, they could only be found through their pulsed radio emissions. Scientists at the Max Planck Institute in Hanover, Germany, using data collected by NASA's Fermi Gamma-Ray Space Telescope, have discovered a millisecond pulsar solely via its pulsed gamma radiation. The pulsar spins 390 times per second, emitting gamma-ray photons into space in the form of a beam, similar to a lighthouse. The novel gamma-ray analysis method developed by the Max Planck researchers has opened the door to an easier way of finding these elusive celestial objects.
| Read full story | 0 Comments... |
Earth-Sized Planet Discovered Orbiting Alpha Centauri B Posted by Guy Pirro on 11/7/2012 3:19 PM
A Swiss-based team at the University of Geneva, searching for exoplanets (i.e., planets that exist outside our solar system), has detected an Earth-mass planet orbiting the star Alpha Centauri B. The idea that one or more planets might orbit the star system closest to Earth has been a favorite subject of science-fiction writers for decades. It is no surprise then that the possibility of an Earth-mass planet orbiting Alpha Centauri B has piqued substantial interest among astronomers and the general public.
Hyperbolic Sungrazer Comet May Put On a Spectacular Show Next Year Posted by Guy Pirro on 10/25/2012 4:04 PM
Currently located beyond the orbit of Jupiter, Comet C/2012 S1 (aka. ISON) is heading for a very close encounter with the sun next year. These types of comets are called "Sungrazers" because their hyperbolic orbits closely brush the Sun. In November 2013, ISON will pass less than 0.012 AU (1.8 million km) from the solar surface. The fierce heating it experiences could turn the comet into a bright and spectacular naked-eye object, possibly even visible during daylight.
| Read full story | 1 Comments... |
تبادل
لینک هوشمند
