Latest HD 141569 Stories

Planets Likely Cause Of Star’s Disk Gap
2012-11-10 11:41:26

redOrbit Staff & Wire Reports — Your Universe Online A large gap discovered in the protoplanetary disk of a Sun-like star may have resulted from the birth of multiple planets, an international team of researchers claim in a new study. Jun Hashimoto of the National Astronomical Observatory of Japan (NAOJ), Ruobing Dong of Princeton University, and colleagues used state-of-the-art equipment to examine PDS 70 (an object discovered by the Pico dos Dias Observatory in Brazil in the...

2009-07-01 08:04:49

Two University of Hawai'i at Mānoa astronomers have found a binary star-disk system in which each star is surrounded by the kind of dust disk that is frequently the precursor of a planetary system. Doctoral student Rita Mann and Dr. Jonathan Williams used the Submillimeter Array on Mauna Kea, Hawaii to make the observations. A binary star system consists of two stars bound together by gravity that orbit a common center of gravity. Most stars form as binaries, and if...

2008-01-10 10:50:00

What superficially resembles a giant moth floating in space is giving astronomers new insight into the formation and evolution of planetary systems. This is not your typical flying insect. It has a wingspan of about 22 billion miles. The wing- like structure is actually a dust disk encircling the nearby, young star HD 61005, dubbed "The Moth." Its shape is produced by starlight scattering off dust. Dust disks around roughly 100-million-year-old stars like HD 61005 are typically flat,...

2007-07-19 11:26:46

Astronomers using the Hubble Space Telescope and W. M. Keck Observatory have found a lopsided debris disk around a young star known as HD 15115. As seen from Earth, the edge-on disk resembles a needle sticking out from the star. Astronomers think the disk's odd imbalanced look is caused by dust following a highly elliptical orbit about the star. The lopsided disk may have been caused by the gravity of planets sweeping up debris in the disk or by the gravity of a nearby star. The observations...

2006-07-03 10:18:58

A close look at the protoplanetary disk around a young star by two teams of astronomers using the Subaru telescope on Mauna Kea has led to the unexpected discovery of two banana-shaped arcs facing each other. The disk, which surrounds the star HD142527, also shows a gap that could be the tumultuous birthplace of a planet, and an extended arc that could have formed during a recent encounter with a stellar neighbor. This discovery adds yet more variety to the bewildering diversity of...

2006-06-27 14:30:00

NASA's Hubble Space Telescope has revealed not one but two dust disks circling the nearby star Beta Pictoris. The images confirm a decade of scientific speculation that a warp in the young star's dust disk may actually be a second inclined disk, which is evidence for the possibility of at least one Jupiter-size planet orbiting the star. The disk is fainter than the star because, at the visible wavelengths measured, its dust only reflects light. To see the faint disk, astronomers used Hubble's...

2006-01-19 11:57:41

NASA -- These two bright debris disks of ice and dust appear to be the equivalent of our own solar system's Kuiper Belt, a ring of icy rocks outside the orbit of Neptune and the source of short-period comets. The disks encircle the types of stars around which there could be habitable zones and planets for life to develop. The disks seem to have a central area cleared of debris, perhaps by planets. The new disks, each about 60 light-years from Earth, bring to nine the number of dusty debris...

Word of the Day
  • A blustering, bullying fellow; a pot-valiant braggart; a bully.
This word is named for Draw-Can-Sir, a character in George Villiers' 17th century play The Rehearsal.