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82 notícias encontradas para "astronomers"
To ancient astronomers, Theta Eridani was brighter for 1,000 years—now we know why
To ancient astronomers, Theta Eridani was brighter for 1,000 years—now we know why
There's a bit of a historical mystery surrounding the star Theta Eridani. Ptolemy in the second century A.D. and al-Sufi in A.D. 964 both recorded Theta Eridani as one of the 13 brightest stars in the sky. Hipparchus may have said the same. But there's a problem. For it to be one
Dark energy flips its sign, but the Hubble tension refuses to budge
For nearly a century, astronomers have known that the universe is expanding. In the late 1990s, two independent teams, the Supernova Cosmology Project, led by Saul Perlmutter, and the High-Z Supernova Search Team, led by Brian Schmidt and Adam Riess, discovered something strange:
X-ray tracking reveals uneven expansion in young supernova remnant G292.0+1.8
X-ray tracking reveals uneven expansion in young supernova remnant G292.0+1.8
By analyzing data from NASA's Chandra X-ray Observatory, Dutch astronomers have investigated a young, oxygen-rich supernova remnant known as G292.0+1.8. Results of the new study, published June 29 on the arXiv preprint server, yield important insights into the expansion of this r
Space jam: astronomers detect ‘raspberry sugar’ on dust cloud in Milky Way
Space jam: astronomers detect ‘raspberry sugar’ on dust cloud in Milky Way
Detection of erythrulose shows compounds that are key to life can form in expanse between starsA natural sugar found in raspberries and used in fake tan lotions has been detected in an enormous cloud of dust and gas that lurks near the heart of the Milky Way.The discovery does no
Hubble discovers first of star cluster's missing black holes
Hubble discovers first of star cluster's missing black holes
The massive globular star cluster Omega Centauri has puzzled astronomers for decades. It should be filled with black holes left behind by exploding stars, yet evidence for them is scarce. Now, astronomers using archival data from NASA's Hubble Space Telescope and supporting obser
Astronomers' surprise at discovery of new stars
Astronomers' surprise at discovery of new stars
A Warwick University team, working with US astronomers, find four, previously hidden, white dwarf stars. O recorte ajuda a contextualizar a pauta dentro de Agro.
Are there aliens on exoplanet K2-18b? Scientists just scanned it for signals
Are there aliens on exoplanet K2-18b? Scientists just scanned it for signals
K2-18b is one of the most promising worlds for the search for extraterrestrial life, so astronomers conducted an unusually powerful radio survey using both the VLA and MeerKAT telescopes. Advanced software analyzed millions of signals, filtering out Earth-based interference and o
Magnetic fingerprint of a cosmic explosion detected for the first time
Magnetic fingerprint of a cosmic explosion detected for the first time
Astronomers have made a series of landmark observations of one of the universe's most violent events. Using the U.S. National Science Foundation Very Large Array (NSF VLA) radio telescope, which is operated by the U.S. National Science Foundation National Radio Astronomy Observat
Astronomers uncover the earliest known signs of galaxy-building in action
Astronomers uncover the earliest known signs of galaxy-building in action
Astronomers at Durham University have made a major advance in understanding how galaxies formed and evolved in the early universe. Using powerful new observations, the team discovered the most distant example ever found of a compact, star-forming structure at the heart of a galax
Astronomers just found four hidden white dwarf stars near Earth
Astronomers just found four hidden white dwarf stars near Earth
Four nearby white dwarf stars have been discovered hiding in plain sight beside brighter red dwarf companions. Hubble's ultraviolet observations finally revealed the long-hidden stellar remnants, including one just 25 light-years away that took nearly three decades to confirm. Th