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|Astronomy News -- ScienceDaily|
Updated : Sat, 16 Feb 2019 02:37:46 EST
Tidal tails: The beginning of the end of an open star cluster
In the course of their life, open star clusters continuously lose stars to their surroundings. The resulting swath of tidal tails provides a glimpse into the evolution and dissolution of a star cluster. Thus far only tidal tails of massive globular clusters and dwarf galaxies have been discovered in the Milky Way system. In open clusters, this phenomenon existed only in theory. Researchers have now finally verified the existence of such a tidal tail in the star cluster closest to the Sun, the Hyades. An analysis of measurements from the Gaia satellite led to the discovery.
Publ.Date : Fri, 15 Feb 2019 11:03:00 EST
A nearby river of stars
Astronomers have found a river of stars, a stellar stream in astronomical parlance, covering most of the southern sky. The stream is relatively nearby and contains at least 4000 stars that have been moving together in space since they formed, about 1 billion years ago.
Publ.Date : Fri, 15 Feb 2019 09:29:08 EST
Philosophy: What exactly is a black hole?
What is a black hole? A philosopher shows that physicists use different definitions of the concept, depending on their own particular fields of interest.
Publ.Date : Thu, 14 Feb 2019 11:55:46 EST
Spacecraft measurements reveal mechanism of solar wind heating
A new study describes the first direct measurement of how energy is transferred from the chaotic electromagnetic fields in space to the particles that make up the solar wind, leading to the heating of interplanetary space.
Publ.Date : Thu, 14 Feb 2019 08:46:58 EST
How cosmic events give insight into fundamental properties of matter
The option to measure the gravitational waves of two merging neutron stars has offered the chance to answer some of the fundamental questions about the structure of matter. At the extremely high temperatures and densities in the merger scientists conjecture a phase-transition where neutrons dissolve into their constituents: quarks and gluons.
Publ.Date : Thu, 14 Feb 2019 08:46:50 EST
Earth's magnetic shield booms like a drum when hit by impulses
The Earth's magnetic shield booms like a drum when it is hit by strong impulses, according to new research.
Publ.Date : Tue, 12 Feb 2019 08:15:40 EST
A thousand new objects and phenomena in night sky
The Zwicky Transient Facility, based at the Palomar Observatory, has identified over a thousand new objects and phenomena in the night sky, including more than 1,100 new supernovae and 50 near-Earth asteroids. The alert system informs science teams of possible new objects or changes to known objects in the sky.
Publ.Date : Thu, 07 Feb 2019 13:10:56 EST
Dynamic atmospheres of Uranus, Neptune
NASA's Hubble Space Telescope has uncovered another mysterious dark storm on Neptune and provided a fresh look at a long-lived storm circling around the north polar region on Uranus.
Publ.Date : Thu, 07 Feb 2019 11:49:55 EST
Bubbles of brand new stars
This dazzling region of newly forming stars in the Large Magellanic Cloud (LMC) was captured by the Multi Unit Spectroscopic Explorer instrument (MUSE) on ESO's Very Large Telescope. The relatively small amount of dust in the LMC and MUSE's acute vision allowed intricate details of the region to be picked out in visible light.
Publ.Date : Wed, 06 Feb 2019 11:56:14 EST
Massive collision in the planetary system Kepler 107
Two of the planets which are orbiting the star Kepler 107 could be the result of an impact similar to that which affected the Earth to produce the moon.
Publ.Date : Wed, 06 Feb 2019 10:46:15 EST
The vibrating universe: Making astronomy accessible to the deaf
Astronomers designed an astronomy workshop for students with hearing loss that can be easily used in classrooms, museums, fairs, and other public events. The workshop utilized a sound stage that allowed the CSDR students to 'feel' vibrations from rockets, stars, galaxies, supernovae, and even remnants of the Big Bang itself.
Publ.Date : Tue, 05 Feb 2019 13:40:21 EST
First accurate 3D map of the Milky Way reveals a warped galaxy
The Milky Way's disk of stars becomes increasingly 'warped' and twisted far away from its center, according to astronomers who have built the first accurate 3D map of Earth's home galaxy.
Publ.Date : Mon, 04 Feb 2019 11:46:05 EST
Retreating snow line reveals organic molecules around young star
Astronomers using ALMA have detected various complex organic molecules around the young star V883 Ori. A sudden outburst from this star is releasing molecules from the icy compounds in the planet forming disk. The chemical composition of the disk is similar to that of comets in the modern solar system. Sensitive ALMA observations enable astronomers to reconstruct the evolution of organic molecules from the birth of the solar system to the objects we see today.
Publ.Date : Mon, 04 Feb 2019 11:45:35 EST
Hubble fortuitously discovers a new galaxy in the cosmic neighborhood
Astronomers using the NASA/ESA Hubble Space Telescope to study some of the oldest and faintest stars in the globular cluster NGC 6752 have made an unexpected finding. They discovered a dwarf galaxy in our cosmic backyard, only 30 million light-years away.
Publ.Date : Thu, 31 Jan 2019 12:59:33 EST
Detailed maps of thousands of nearby galaxies
The latest data release from the Sloan Digital Sky Survey (SDSS) includes observations revealing the internal structure and composition of nearly 5,000 nearby galaxies observed during the first three years of a program called Mapping Nearby Galaxies at Apache Point Observatory.
Publ.Date : Tue, 29 Jan 2019 12:48:25 EST
To catch a wave, rocket launches from top of world
On Jan. 4, 2019, at 4:37 a.m. EST the CAPER-2 mission launched from Norway. The rocket flew through active aurora borealis, or northern lights, to study the waves that accelerate electrons into our atmosphere.
Publ.Date : Mon, 28 Jan 2019 14:25:20 EST
Missing-link in planet evolution found
For the first time ever, astronomers have detected a 1.3 km radius body at the edge of the Solar System. Kilometer sized bodies like the one discovered have been predicted to exist for more than 70 years. These objects acted as an important step in the planet formation process between small initial amalgamations of dust and ice and the planets we see today.
Publ.Date : Mon, 28 Jan 2019 11:17:21 EST
Stellar winds, the source material for the universe, are clumpy
Data recorded by NASA's Chandra X-ray Observatory of a neutron star as it passed through a dense patch of stellar wind emanating from its massive companion star provide valuable insight about the structure and composition of stellar winds.
Publ.Date : Thu, 24 Jan 2019 14:16:00 EST
How to escape a black hole: Simulations provide new clues about powerful plasma jets
New simulations have combined decades-old theories to provide new insight about the driving mechanisms in plasma jets that allows them to steal energy from black holes' powerful gravitational fields and propel it far from their gaping mouths.
Publ.Date : Thu, 24 Jan 2019 13:38:32 EST
Brain condition related to long-term spaceflights needs more attention, data
More people are poised to explore space than ever before; those who do will experience the effects of microgravity on the human body.
Publ.Date : Thu, 24 Jan 2019 11:53:50 EST