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1,000+ results for "Hubble Telescope"

Zeroing in on Hubble's constant

The Carnegie Hubble Program aims to decrease the uncertainty of the Hubble constant from 10% to 3% by refining distances to galaxies using Cepheid variable stars and Spitzer telescope observations. The team will observe 700 hours of nearby galaxies, correcting for lingering uncertainties and systematic errors.

Cosmic eye sheds light on early galaxy formation

Researchers at Durham University and Caltech used gravitational lensing to study a young star-forming galaxy in the distant Universe, revealing its internal velocity structure and spiral disk. The findings provide insight into how the galaxy evolved into a present-day system like our Milky Way.

SourceDurham University·JournalNature·DateOct 8, 2008

James Webb Telescope components pass tests

Development models for James Webb Telescope components have successfully passed temperature and vibration tests, allowing engineers to proceed with building actual instrument parts. The Mid-Infrared Instrument, which will operate between mid-infrared wavelengths of 5-28.5 microns, must be kept icy cold due to its extreme sensitivity to...

Ultra-dense galaxies found in early universe

Astronomers find nine young, compact galaxies with masses of 200 billion times the Sun's, each only 5,000 light-years across. These ultra-dense galaxies formed 11 billion years ago and are thought to be building blocks for today's largest galaxies.

SourceYale University·JournalThe Astrophysical Journal Letters·DateApr 29, 2008

Exploding star in NGC 2397

A team of astronomers from Queen's University Belfast have discovered the nature of five supernova precursor stars using Hubble images. The study reveals that stars with masses as low as seven times the mass of the Sun can explode as supernovae, challenging current understanding of massive star collapse.

UBC astronomer produces first detailed map of dark matter in a supercluster

For the first time, astronomers have directly visualized the distribution of dark matter in a supercluster, allowing for the detection of irregular clumps and detailed shapes. This breakthrough study, led by UBC researcher Catherine Heymans, uses NASA's Hubble Space Telescope to map the Abell 901/902 supercluster.

SourceUniversity of British Columbia·JournalMonthly Notices of the Royal Astronomical Society·DateJan 10, 2008