Title: Could Jupiter or Saturn Have Ejected a Fifth Giant Planet? Author: Ryan Cloutier, Daniel Tamayo, Diana Valencia Models of the dynamical evolution of the early solar system following the dispersal of the gaseous protoplanetary disk have been widely successful in reconstructing the curre...
A layer deep in the solar atmosphere can be used to estimate the speed of the solar wind, a stream of electrified gas that constantly blows from the Sun. Estimating the speed of the solar wind will improve space weather fore...
Title: Discovery of a Stellar Overdensity in Eridanus-Phoenix in the Dark Energy Survey Author: T. S. Li, E. Balbinot, N. Mondrik, J. L. Marshall, B. Yanny, K. Bechtol, A. Drlica-Wagner, D. Oscar, B. Santiago, J. D. Simon, A. K. Vivas, A. R. Walker, M. Y. Wang, T. M. C. Abbott, F. B. Abdalla, A. Benoit-...
Title: The Phoenix stream: a cold stream in the Southern hemisphere Author: E. Balbinot, B. Yanny, T. S. Li, B. Santiago, J. L. Marshall, D. A. Finley, A. Pieres, T. M. C. Abbott, F. B. Abdalla, S. Allam, A. Benoit-Lévy, G. M. Bernstein, E. Bertin, D. Brooks, D. L. Burke, A. Carnero Rosell, M. Carrasco K...
Title: Proper motions of the Arches cluster with Keck-LGS Adaptive Optics: the first kinematic mass measurement of the Arches Authors: Will Clarkson, Andrea Ghez, Mark Morris, Jessica Lu, Andrea Stolte, Nate McCrady, Tuan Do, Sylvana Yelda We report the first detection of the intrinsic velocit...
NGC 3628 (also Sarah's Galaxy, Arp 317, IRAS 11176+1351, MCG 2-29-20, UGC 6350 and PGC 34697) is a magnitude +10.3 edge-on spiral galaxy located 35 million light years away in the constellation Leo. NGC 3628 along with M65 and M66 form the famous Leo Triplet. The galaxy was discovered by German-Bri...
Astronomers Study Shape of Stellar Candles
Astronomers are reporting remarkable new findings that shed light on a decade-long debate about one kind of supernovae, the explosions that mark a star's final demise: does the star die in a slow burn or with a fast bang? From their observations...
Battle of the Teutoburg Forest (described as clades Variana, the Varian disaster by Roman historians) (German: Schlacht im Teutoburger Wald, Hermannsschlacht or Varusschlacht) took place in 9 CE, when an alliance of Germanic tribes led by Arminius (German: Armin) (also known as "Hermann...
The 95 - 210 metre wide asteroid 2015 RM83 made a close pass (40.8 LD, 0.1048 AU) travelling at 11.68 km/second, to the Earth-Moon system on the 12th September 2015 @ 06:33 UT ±00:13. See more The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).
The 60 - 130 metre wide asteroid 2015 RL83 made a close pass (59.7 LD, 0.1535 AU) travelling at 8.38 km/second, to the Earth-Moon system on the 12th September 2015 @ 16:05 UT ±00:11. See more The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).
The 24 - 54 metre wide asteroid 2015 SA made a close pass (2.9 LD, 0.0075 AU) travelling at 8.51 km/second, to the Earth-Moon system on the 15th September 2015 @ 00:51 UT ±00:01. See more The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).
Pope Benedict XVI has appointed Jesuit Father José Gabriel Funes as the new director of the Vatican Astronomical Observatory, replacing Jesuit Father George Coyne.
Father Coyne, a native of Baltimore, Maryland, US, had been director of the observatory since 1978.
The Vatican press offic...
Extinct Tree Grows Again from Jar of Ancient Seeds Archaeologists found a 2,000 year-old jar of Judean date palm seeds, a tree which has been extinct since 500 AD. They planted them and they grew. Read more
Astronomy Day is an annual event intended to provide a means of interaction between the general public and various astronomy enthusiasts, groups and professionals. Astronomy Day also forms part of Astronomy Week, which begins on the preceding Monday. Read more
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