Sloan Digital Sky Survey Supports Dark Energy as the Primary Constituent of the Universe
This figure shows the SDSS spectrum of a quasar at a distance of 12 billion light years.
Chandra Looks Over a Cosmic Four-Leaf Clover
The Cloverleaf quasar is a single object whose image has been reproduced four times in a cloverleaf-like arrangement through a process known as gravitational lensing.
Making Black Holes Go 'Round on the Computer
Credit: Bruegmann, Tichy, Jansen 2004 Black hole binary after about one orbit. The black surfaces represent the black holes; whatever falls behind this black hole "horizon" can never escape again. The colored plane shows a measure for the distortion of spacetime. The numerical method has succeeded in keeping the data smooth and undistorted.
Genetic Barrier to Self-Pollination Identified
The S-locus controls the specificity of the self-incompatibility interactions between pollen and pistil. Matching of the S-allele carried by the pollen with one of the two S-alleles carried by the pistil results in the growth arrest of the pollen tube in the style. Only pollen tubes that carry a different S-allele from the S-allele of the pistil will be able to grow down the style to the ovary to achieve fertilization.
Small, Cold, and Hungry: Ultra-Small Microbes from a 120,000-Year-Old Greenland-Glacier Ice Sample
Material from a 120,000-year-old Greenland Glacier ice sample showing micro-microbes (small white oblong forms) and larger materials.
First Step Made Toward Comprehensive Use of Human Genome for Fighting Human Diseases
Wojciech Makalowski
Hobby-Eberly Telescope Witnesses Vaporizing of a Comet-like Body by a Very Young Hot Star
Location of the star LKHa 234 in the star-forming nebula NGC 7129 Photo: Lars Lindberg Christensen, ESA/Hubble
Titan, a Moon of Saturn, Casts Revealing Shadow
Photo credit: NASA/CXC/Penn State/K.Mori et al.
Research Reveals Halogen Characteristics of Cluster of Metal Atoms
Figure 1: Charge density map of the highest occupied molecular orbital for the Al13I- cluster. Note the preservation of Al13I- icosahedral geometry, and the localized charge density on the aluminum cluster moiety. Color code: blue=aluminum; red=iodine.
Team Including Penn State Researchers Announces Completed Gene Sequencing of Laboratory Rat
Photo credit: Martin Krzywinski
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