Tag

Observational Evidence

All articles tagged with #observational evidence

astronomy2 years ago•8 min saved

Unraveling the Mysteries of the Universe: A Recent Breakthrough

Humanity's understanding of the universe has evolved over time, with ancient peoples observing and cataloging celestial phenomena thousands of years ago. Key milestones include the prediction of eclipses by the Babylonians, the measurement of Earth's circumference by Eratosthenes, and Aristarchus' estimation of the Moon's size and distance. The discovery of planetary motion in ellipses, the periodic nature of comets, and the existence of distant planets expanded our knowledge. Modern breakthroughs include the measurement of galactic distances, the confirmation of the Big Bang, the discovery of dark matter and dark energy, and the observational evidence for inflation. New discoveries, such as those made by the James Webb Space Telescope, continue to refine our understanding of the cosmos.

via Big Think|

#ancient-astronomy #astronomy #cosmology

astronomy2 years ago•3 min saved

"Infant Star Flees the Nest: Astronomers Uncover Spectacular Escape"

Astronomers have discovered an infant protostar leaving its birthplace, providing new observational evidence for escaping stars. Using high-resolution molecular spectral lines, the researchers found a protostellar core with a noticeable velocity shift in the star-forming region G352.63-1.07. The core's spectral velocity indicates a significant blue shift relative to its parental cloud, suggesting that the escape occurred less than 4,000 years ago. This discovery sheds light on the initial state and mechanisms of escaping stars in galactic evolution.

via Phys.org|

#astronomy #escaping-star #kinematic-features

climate-change2 years ago•6 min saved

"Gulf Stream Weakening Confirmed by Groundbreaking Study"

A new study using Bayesian modeling has provided the first conclusive evidence that the Gulf Stream, a major ocean current off the U.S. East Coast, has weakened by about 4% over the past four decades. The study, based on data from undersea cables, satellite altimetry, and in situ observations, confirms a significant long-term change in the Gulf Stream's transport of water through the Florida Straits. The weakening of this climate-relevant ocean current could have implications for weather, climate, and coastal conditions, including European surface air temperature, precipitation, coastal sea level, and North Atlantic hurricane activity. The study does not determine the cause of the weakening, leaving it open to future investigation.

via Phys.org|

#climate-change #gulf-stream #observational-evidence

science-and-technology2 years ago•5 min saved

Cracking the Code: Unraveling the Magnetic Secrets of Black Hole Accretion

Scientists have made a breakthrough in understanding the magnetic field transport processes and the formation of a magnetically arrested disk (MAD) near a black hole. Using multi-wavelength observations of the black hole X-ray binary MAXI J1820+070, researchers discovered that the radio emission from the black hole jet and the optical emission from the outer region of the accretion flow lag behind the hard X-rays from the inner region by about eight and 17 days, respectively. These observations provide direct evidence for the existence of a MAD and shed light on the formation and transport mechanisms of magnetic fields in black hole accretion.

via SciTechDaily|

#accretion #black-holes #magnetic-fields

astronomy2 years ago•3 min saved

Discovery of 1,179 New Star Clusters in Milky Way

Astronomers from Guangzhou University have cataloged over 1,100 new star clusters in the Milky Way using data from the Gaia telescope. The team used AI learning models to sort through the data and visually confirmed each of the 1,179 clusters they found. This study significantly increases the overall total of star clusters in the Milky Way and moves astronomers closer to confirming the theory about the total number of open clusters in the galaxy.

via Phys.org|

#ai-learning-models #astronomy #gaia