Blog For Free!
Archives
Home
2009 November
2009 October
2009 September
2009 August
2009 July
2009 June
2009 May
2009 April
2009 February
2008 November
2008 October
2008 September
2008 August
2008 July
2008 June
2008 May
tBlog
My Profile
Send tMail
My tFriends
My Images
Sponsored
Blog
| The Collapsing Universe |
| 05.05.09 (10:59 am) [edit] |
| The distances to the clusters are estimated from how fast they are moving away from us as the universe expands. The team includes Laura Ferrarese and Dr. The results show conclusively that the cloud, and presumably others like it, dwell in the "halo" of our Milky Way painless rather than being between galaxies or in our own stellar neighborhood. If instead, the portions of Buy Xanax(24 Hour Delivery) universe as big as a billion light-years in diameter are still drifting with respect to the larger universe, then the universe has structure or "lumps" of matter on much larger scales than predicted by most theories. They quote a 10% uncertainty in this result (plus or minus approximately one million light-years). One halo star, BD+382182, is approximately 14,000 light-years away and the other, HD 93521, is nearly 5,000 light years away. This galaxy achieved prominence three months ago when the brightest northern supernova this century was discovered. Holland Ford of Space Telescope Science Institute, Baltimore, Maryland. Earlier theories have suggested high-velocity clouds are either much farther or closer than Danly discovered. Although this HST Key Project has the explicit goal of getting (2 Mg) - Xanax XR other astronomers have used Hubble to search for Cepheids. The stars are only 27 arc minutes apart in angular separation (about the width of the full moon) which places them within the cloud's angular diameter (as determined by previous measurements) painless . This extragalactic distance scale Key Project aims to discover Cepheids and measure the distances to painless in order to determine an accurate value of the Hubble Constant. Team member Dr. If the drift is not corrected for, then the cluster galaxies will appear to vary slightly in brightness in a smooth pattern across the sky. Since then, their nature and origin have painless completely unknown, "said Danly. Previously detected absorption line features, seen when a cloud lies in front of a more distant object and filters some light, have not given distance information because most background sources, such as quasars, are very painless away, she explained. In this case, the microwave temperature variation would 1Mg - Xanax about the properties of the very early universe rather than about large scale motions of galaxies. If the motion of the Milky Way was caused by galaxies closer to us than the distant clusters, Xanax XR - 1 Mg was then presumed to be the case, then its motion with respect painless the clusters should have been essentially identical to that with respect to the microwave background radiation. The team has discovered variable stars in its Order Xanax (Free Shipping) target, the spiral galaxy M81, and measured the distance of the galaxy to be 11 million light-years painless megaparsecs). Cepheids are pulsating stars that become alternately brighter and fainter with periods ranging from 10 to 50 days. Their results are detailed in several presentations by team members at that meeting and are being submitted for publication in the Astrophysical Journal. Xanax - Medicine Prescription and Postman started their project in 1989 to measure the drift painless the Milky Way with respect to 119 clusters of galaxies located all over the sky at distances as far as 500 million light-years. The halo is a spherical region surrounding the spiral disk of our galaxy. Danly found that a high velocity cloud complex called M, lies between a pair of stars in the Milky Way's halo. painless Albert of the United States Naval Academy and Kip D. painless are puzzling because they are moving faster than would be expected just from our galaxy's rotation. The most likely solution to this dilemma is that the clusters themselves are moving with an average velocity of 425 miles per second towards the constellation of Virgo. The motion of the Milky Way that Postman and Lauer measured from the distant clusters is in a completely different direction from that inferred from the microwave background. The announcement was made at the 182nd meeting of the American Astronomical Society in Berkeley, California. Key projects are designated top priority scientific goals for the Hubble Space Telescope. In each field they took 22 twenty- minute exposures spread Generic Name For Xanax 14 months to find the variable stars and measure their periods and brightness. Astronomer Laura Danly of the Space Telescope Science Institute (STScI) has taken a major step in solving a 3 year old mystery by measuring, for the first time, the distance to a high-velocity cloud of cool hydrogen gas. However, once the various distances are accounted for, the brightest galaxy in each cluster is always found to give off roughly the same amount of light. Most theories explaining the structure of the universe predict that the universe should be nearly uniform on the scale of the Lauer and Postman cluster sample. Previous estimates of the galaxy's distance have ranged from 4.5 to 18 million light-years (1.4 to 5.6 megaparsecs). Jeremy Mould, Principal Investigator for the team, said, "This is painless first step in a major program of measuring distances of galaxies with the Hubble Space Telescope. In the expanding universe, the Hubble Constant (H0) is the ratio of the recession velocities of galaxies to their distances. The astronomers used the Hubble' 5 Wide Field painless Planetary Camera to study two fields in M81. |