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Wide Binary Stars Can Wreak Havoc in Planetary Systems. EVANSTON, Ill. --- An international team of astrophysicists has shown that planetary systems with very distant binary stars are particularly susceptible to violent disruptions, more so than if the systems had two stellar companions with tighter orbits around each other.

Wide Binary Stars Can Wreak Havoc in Planetary Systems

The team, led by Northwestern University’s Nathan Kaib, conducted 3,000 computer simulations to study the effects of binary stellar companions (some with tight orbits around each other and others with wide or distant orbits) on the formation and evolution of planetary systems. The researchers found that wide binary stars in planetary systems can lead to dramatic events over time. In one hypothetical system, the researchers added a wide binary companion to the Earth’s solar system. This triggered at least one of four giant planets (Jupiter, Saturn, Uranus and Neptune) to be ejected in almost half of the simulations.

The study was published Jan. 6 by the journal Nature. Wide Binary Stars: Long-Distance Stellar Relationships. Synopsis: Using computer simulations, scientists from Hawaii and Finland have figured out how wide binary stars—two stars that orbit each other at a distance up to a light-year—form.

Wide Binary Stars: Long-Distance Stellar Relationships

Our Sun is a single star. This puts it in a minority of stars because most stars are binaries—two stars that orbit each other and are bound together by their mutual gravity. Binaries can be very close, sometimes so close that they actually touch each other. Other pairs are extremely wide, with separations up to a light-year or so. Astronomers have known about such wide pairs for a long time, but how they form has been a mystery. Research contributes to new theory about the birth of wide binary stars.

By Kara Furlong | Posted on Thursday, Dec. 13, 2012 — 2:08 PM Three-color composite images of a sample of ultra-wide binary star systems, out of more than 1,300 such systems identified in the Sloan Digital Sky Survey.

research contributes to new theory about the birth of wide binary stars

Each image is 50 arcseconds on a side, corresponding to physical separations of the binary systems of up to one parsec. The systems include “identical twins” (a–d) and non-identical twins (e–j). In some cases, the systems are found to be triplets (l–o) or even quadruplets (k). (Saurav Dhital/Vanderbilt, Boston U.) Solar System - Sirius (9 Alpha Canis Majoris - HD48915) The Star Sirius. Is the Sun Part of a Binary Star System? - Six Reasons to Consider.

© Binary Research Institute Just what is the real cause behind the precession of the equinoxes and why did the ancients believe this cycle was so important?

Is the Sun Part of a Binary Star System? - Six Reasons to Consider

Walter Cruttenden asks this question in his latest book Lost Star of Myth and Time and comes to some provocative conclusions. The Mysterious Connection Between Sirius and Human History. Since ancient times and across multiple civilizations, Sirius, the dog star, has been surrounded with a mysterious lore. Esoteric teachings of all ages have invariably attributed to Sirius a special status and the star’s importance in occult symbolism is an attestation of that fact.

Sirius - The Sacred Star of Isis. Sirius: The Sacred Star of Isis The Star of the New YearBy Cynthia Isis Anderson The Beautiful Star of Isis now called Sirius, but anciently called Sothis by the Greeks and Sopdet by the Egyptians, was considered to open the way for the Nile flood, which brought life and fertility back to the land of Egypt.

Sirius - The Sacred Star of Isis

A Sun-Sirius System? Sirius is a binary system.

A Sun-Sirius System?

Planets with double suns are common. Astronomers using NASA's Kepler mission have discovered two new circumbinary planet systems -- planets that orbit two stars, like Tatooine in the movie Star Wars.

Planets with double suns are common

Their find, which brings the number of known circumbinary planets to three, shows that planets with two suns must be common, with many millions existing in our Galaxy. "Once again, we're seeing science fact catching up with science fiction," said co-author Josh Carter of the Harvard-Smithsonian Center for Astrophysics. The work was published online in the journal Nature and presented by lead author William Welsh (San Diego State University) at a meeting of the American Astronomical Society. The two new planets, named Kepler-34b and Kepler-35b, are both gaseous Saturn-size planets. Kepler-34b orbits its two Sun-like stars every 289 days, and the stars themselves orbit each other every 28 days.

"It would be like cycling through all four seasons many times per year, with huge temperature changes," explained Welsh. Scientists say at least one in six stars has an Earth-sized planet. The latest analysis of data coming from NASA's Kepler telescope has revealed that nearly all the Sun-like stars in our galaxy appear to have planets orbiting them, and that at least 17 percent of them – about one in six – are hosting a planet the size of our own in close orbit.

Scientists say at least one in six stars has an Earth-sized planet

Because the Milky Way is estimated to contain some 100 billion stars, this means that our galaxy alone could have at least 17 billion Earth-sized planets, some of which may harbor the conditions for life. Sirius - Astronomy, Mythology, Pseudoscience. Sirius Sirius is the brightest star in the night sky.

Sirius - Astronomy, Mythology, Pseudoscience

With a visual apparent magnitude of -1.46, it is almost twice as bright as Canopus, the next brightest star. The name "Sirius" is derived from the Ancient Greek Seirios ("glowing" or "scorcher"). Sirius research group claims about Earth's precession - Hypography Science Forums. The trouble is, trying to build a physical model that demonstrates ("demonstrates") the actual force(s) that would slow or speed up any motion of the Earth, including spin or precession, doesn't yield any obvious results.

Sirius research group claims about Earth's precession - Hypography Science Forums

The "gravity" we feel from Sirius A + Sirius B can be modeled by placing the sum of their masses at their Center of Mass. So, if we focus our efforts on just Sirius B (the white dwarf) then its average distance is, as Uncle Al so kindly provided, 8.1 * 10^16 meters. FACTS ABOUT SIRIUS. Sirius Research Group. Karl-Heinz Homann (April 29, 1933 – April 23, 2008): Karl-Heinz was born in Oer-Erkenschwick near Recklinghausen, Germany.

He had a background as a mechanic and machinist, and had a Master's Degree as an Electronic Technician. Most of his life he was self-employed, both in Germany and in Canada. He and his family emigrated to Canada in 1980. He spent his remaining years on a small farm near Peers, Alberta. Every job was his hobby. De Lubicz says an interesting thing while talking about the Egyptians use of Sirius to time their yearly calendar events.