Research resolves a debate over ‘killer electrons’ in space. New findings by a UCLA-led international team of researchers answer a fundamental question about our space environment and will help scientists develop methods to protect valuable telecommunication and navigation satellites.
The research is published today in the journal Nature Communications. Using measurements from the first U.S. satellite that traveled to space, Explorer 1 physicist James Van Allen discovered in 1958 that space is radioactive. The Earth is surrounded by two doughnut-shaped rings of highly charged particle radiation — an inner ring of high-energy electrons and positive ions and an outer ring of high-energy electrons — that are now known as Van Allen Radiation Belts. Flying close to the speed of light, the high-energy particles that populate the belts create a harsh environment for satellites and humans in space.
Zentrum für Astronomie: Gaia Sky. Asteroseismology of Stellar Populations in the Milky Way. Astronomy Image Explorer. Chandra Sky Map. Guess what? A compelling new mathematical definition makes our humble moon a planet. Over the weekend, the world had to digest the horror of the Paris attacks that killed at least 129 people and injured another 300.
Parents also had to figure out what to say to their kids, and when. For kids around six and older, the time is now. If parents don’t frame something like the Paris attacks for kids, their own vivid imaginations or some other kid on the playground will. At that point, there is no guarantee that the framing will be accurate, age-appropriate, or thoughtful enough to teach something useful. Starting a conversation—no matter how basic—sends the message that the door is open and questions are welcome. “Don’t delay telling your children,” Harold Koplewicz, president of the Child Mind Institute, told Time. 7927_18911_0. Science.iop.org/1538-4357/460/1/L49/pdf/1538-4357_460_1_L49.pdf. Stunning 3-D Models Reveal Bizarre Double Star Acting Up. SDSS at Night. J1906+0746 Press Release Media. Identity crisis? Active Asteroid 62412 Grows Comet-like Tail : SCIENCE : Tech Times.
Asteroid 62412 was believed to be a typical asteroid for many years but two astronomers found it has an unexpected tail making it look like a comet.
It is now being reclassified as an active asteroid. (Photo : NASA, ESA, M.A. Garlick (space-art.co.uk), University of Warwick, and University of Cambridge.) An asteroid just missed Earth. We won't always be so lucky. On Sunday, September 7 — at 2:15 pm Eastern time, to be exact — a small asteroid whizzed by the Earth.
NASA research gives guideline for future alien life search. Astronomers searching the atmospheres of alien worlds for gases that might be produced by life can't rely on the detection of just one type, such as oxygen, ozone, or methane, because in some cases these gases can be produced non-biologically, according to extensive simulations by researchers in the NASA Astrobiology Institute's Virtual Planetary Laboratory.
The researchers carefully simulated the atmospheric chemistry of alien worlds devoid of life thousands of times over a period of more than four years, varying the atmospheric compositions and star types. "When we ran these calculations, we found that in some cases, there was a significant amount of ozone that built up in the atmosphere, despite there not being any oxygen flowing into the atmosphere," said Shawn Domagal-Goldman of NASA's Goddard Space Flight Center in Greenbelt, Maryland. "This has important implications for our future plans to look for life beyond Earth. " Methane is a carbon atom bound to four hydrogen atoms. It All Began in Chaos. The dust speck had been plucked from the tail of a comet more than 200 million miles away.
Now, under an electron microscope in a basement lab at the University of Washington, its image grew larger, until it filled the computer screen like an alien landscape. The Nice Model. Background The Nice model is founded on two aspects of the Solar system deduced in the past couple of decades from observations of the Kuiper Belt. 1) The heavily populated mean-motion resonances in the Kuiper belt strongly suggest that the orbits of the planets have migrated.
Asteroid Vesta more like Earth than realized, study shows. The cold, dead asteroid Vesta might have had a very active inner life early in the solar system's history, according to an unusual analysis of a Saharan meteorite.
Vesta might have had a magma ocean underneath its rocky exterior, allowing bits of mineral to rise and fall between softer and harder layers of material, according to a study published online Sunday by the journal Nature Geoscience. Distant Milky Way M Giants. San Jose State students report major discovery in space. By Katy Murphy firstname.lastname@example.org Posted: 05/25/2014 04:09:25 PM PDT10 Comments|Updated: 24 days ago San Jose State University graduating physics major Richard Vo, right, 23, SJSU senior physics major Michael Sandoval, 21, left, and SJSU physics and astronomy professor Aaron Romanowsky, center, in the physics lounge at San Jose State University, May 22, 2014.