+- +-


Welcome, Guest.
Please login or register.
Forgot your password?

+-Stats ezBlock

Total Members: 54
Latest: abrogard
New This Month: 0
New This Week: 0
New Today: 0
Total Posts: 16476
Total Topics: 270
Most Online Today: 5
Most Online Ever: 1155
(April 20, 2021, 12:50:06 pm)
Users Online
Members: 0
Guests: 3
Total: 3

Author Topic: Majestic and sometimes Spectacular Scenery  (Read 4131 times)

0 Members and 0 Guests are viewing this topic.


  • Administrator
  • Hero Member
  • *****
  • Posts: 33339
  • Location: Colchester, Vermont
    • Renwable Revolution
Re: Majestic and sometimes Spectacular Scenery
« on: August 01, 2014, 12:20:52 am »
HD 162826: Astronomers Discover Second Sun

Astronomers from the United States, Russia and Australia have discovered the first true solar sibling – HD 162826.

D 162826, a star born in the same star cluster as our Sun, is located in the constellation Hercules, about 110 light-years away from Earth. It has a mass about 1.15 times that of the Sun.

The star is not visible to the unaided eye but can be seen with low-power binoculars, not far from Vega.

The astronomers led by Dr Ivan Ramirez from the University of Texas at Austin identified HD 162826 as our Sun’s sibling by following up on 30 possible candidate stars. In addition to chemical analysis, they also analyzed information about orbits of these stars.

Considering both chemistry and orbits narrowed the field of candidates down to one – HD 162826.

“No one knows whether this star hosts any life-bearing planets,” said Dr Ramirez, who reported the discovery in the Astrophysical Journal (arXiv.org version).

Dr Ramirez’s team has ruled out any massive planets orbiting close to the star.

“It’s unlikely that a Jupiter analog orbits the star,” Dr Ramirez said.

However, he and his colleagues do not rule out the presence of smaller terrestrial planets.

“The finding of a single solar sibling is intriguing, but the project has a larger purpose: to create a road map for how to identify solar siblings, in preparation for the flood of data expected soon from surveys such as ESA’s Gaia.”

Gaia will provide accurate distances and proper motions for a billion stars, allowing scientists to search for solar siblings all the way to the center of our Milky Way Galaxy.

“The number of stars that we can study will increase by a factor of 10,000,” Dr Ramirez said.

“Don’t invest a lot of time in analyzing every detail in every star. You can concentrate on certain key chemical elements that are going to be very useful. These elements are ones that vary greatly among stars, which otherwise have very similar chemical compositions. These highly variable chemical elements are largely dependent on where in the Galaxy the star formed.”

“We want to know where we were born. If we can figure out in what part of the Galaxy the Sun formed, we can constrain conditions on the early Solar System. That could help us understand why we are here,” Dr Ramirez said.

Once many more solar siblings have been identified, astronomers will be one step closer to knowing where and how the Sun formed.


I. Ramirez et al. 2014. Elemental Abundances of Solar Sibling Candidates. ApJ, accepted for publication; arXiv: 1405.1723

« Last Edit: March 24, 2020, 12:39:18 am by AGelbert »
Light is sown for the righteous, and gladness for the upright in heart. Ps. 97:11


+-Recent Topics

Books and Audio Books that may interest you 🧐 by AGelbert
September 19, 2021, 05:59:25 pm

Money by AGelbert
September 18, 2021, 02:17:10 pm

Corporate Profits over Patient in the Health Care Field by AGelbert
September 18, 2021, 01:57:52 pm

🚩 Global Climate Chaos ☠️ by AGelbert
September 16, 2021, 01:17:05 pm

🎋 Victories Against the 🦕 Hydrocarbon Hellspawn by AGelbert
September 16, 2021, 01:16:43 pm

COVID-19 🏴☠️ Pandemic by AGelbert
September 15, 2021, 01:00:09 pm

Corruption in Government by AGelbert
September 14, 2021, 02:36:15 pm

Defending Wildlife by AGelbert
September 13, 2021, 01:39:49 pm

Fossil Fuel Propaganda Modus Operandi by AGelbert
September 13, 2021, 12:42:00 pm

911 > September 11 2001 > U.S. Fascist COUP? by AGelbert
September 11, 2021, 06:54:07 pm