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Tag: Astronomers

Astronomers find dozens of massive, ancient galaxies

Astronomers find dozens of massive, ancient galaxies

Science
Aug. 7 (UPI) -- Astronomers have discovered an abundance of vast, ancient galaxies. Scientists spotted the galaxies in the distant universe using the combined power of several space observatories. The discovery, published Wednesday in the journal Nature, could force cosmologists to change their models of the universe. Most models don't predict such an abundance of massive galaxies so early in the evolution of the universe. "This is the first time that such a large population of massive galaxies was confirmed during the first 2 billion years of the 13.7-billion-year life of the universe. These were previously invisible to us," Tao Wang, researcher at the University of Tokyo, said in a news release. "This finding contravenes current models for that period of cosmic evolution and will help ...
Astronomers spot a circumplanetary disk for the first time

Astronomers spot a circumplanetary disk for the first time

Science
July 12 (UPI) -- With the help of the ALMA observatory, scientists have identified a circumplanetary disk in a distant star system -- a first. Astronomers found the moon-forming disk of dust and debris circling an exoplanet in orbit around PDS 70, a low-mass T Tauri star located 370 light-years from Earth. T Tauri stars are a class of young stars characterized by their optical variability. During an earlier survey, scientists discovered two new Jupiter-like planets orbiting PDS 70 using the observational abilities of European Southern Observatory's Very Large Telescope. For the new study, astronomers used Atacama Large Millimeter/submillimeter Array, a collection of high-precision dish antennas in northern Chile, to measure the faint radio waves emitted by the tiny gas particles surround...
Astronomers find white dwarf merger that may spawn future fiery explosion

Astronomers find white dwarf merger that may spawn future fiery explosion

Science
May 21 (UPI) -- Astronomers have discovered a rare celestial object. Scientists suggest the fiery orb was created when two dead white dwarfs merged and become reanimated. According to a new paper describing the unusual stellar object, published this week in the journal Nature, the orb is a ticking time bomb -- likely to explode with a fiery bang in the near future. Scientists first spotted the object while analyzing data collected by the Wide-field Infrared Survey Explorer, or WISE, satellite. Astronomers spotted a bright star at the center of a gas nebula, but were surprised to find no visible light, only infrared radiation, emanating from the nebula. When astronomers analyzed the spectrum emitted by the nebula and its central star, they determined the object contained neither hydrogen ...
New telescopes to help astronomers acquire sharper black hole images

New telescopes to help astronomers acquire sharper black hole images

Science
May 6 (UPI) -- Earlier this year, scientists captured the first up-close image of a black hole. Now, researchers are working on plans to produce even sharper images of the cosmic phenomena. Scientists published their plans for acquiring better black hole images this week in the journal Astronomy and Astrophysics. The plans involve the deployment of two or three coordinated orbital radio telescopes. To showcase the power of their planned constellation of observatories, dubbed the Event Horizon Imager, researchers developed a model to simulate the telescopes' image-making abilities. "There are lots of advantages to using satellites instead of permanent radio telescopes on Earth, as with the Event Horizon Telescope," Freek Roelofs, a PhD candidate at Radboud University in the Netherlands, s...