Tag: stars

Small star passed through the edge of our solar system 70,000 years ago

Small star passed through the edge of our solar system 70,000 years ago

March 9, 2015

An international group of astronomers found that a dim star known as a red dwarf skimmed through the outskirts of our solar system, coming within 8 trillion kilometers of Earth some 70,000 years ago. Eric Mamajek talks about this amazing discovery on today’s “One on One” segment.

Continue Reading

Star Buzzed Our Solar System during Human Prehistory

Star Buzzed Our Solar System during Human Prehistory

February 21, 2015

The red dwarf star, which has a mass about 8% that of the Sun and is orbited by a ‘brown dwarf’ companion, was discovered in 2013 in images recorded by NASA’s Wide-field Infrared Survey Explorer (WISE) mission. It is relatively nearby, at about 6 parsecs (19.6 light years) away.

Continue Reading

Alien star system buzzed the Sun

Alien star system buzzed the Sun

February 18, 2015

In the paper, astronomers led by Eric Mamajek at the University of Rochester, New York, say they are 98% certain that Scholz’s star travelled through what is known as the “outer Oort Cloud” – a region at the edge of the Solar System filled with trillions of comets a mile or more across.

Continue Reading

Alien star missed us by less than a light-year, scientists say

Alien star missed us by less than a light-year, scientists say

February 18, 2015

Astronomers say a red dwarf star and its brown dwarf companion passed within a light-year of our own sun 70,000 years ago, moving through the comets in the outer reaches of the Oort Cloud that surrounds our solar system.

Continue Reading

Close encounters of the starry kind: Red dwarf passed within just 0.8 light years of our solar system

Close encounters of the starry kind: Red dwarf passed within just 0.8 light years of our solar system

February 18, 2015

Dr Eric Mamajek, an astronomer at the University of Rochester who led the study, said that it is unlikely the star would have caused much disturbance to the scattered icy comets that orbit the outermost reaches of our solar system.

Continue Reading

A close call of 0.8 light years

A close call of 0.8 light years

February 16, 2015

A recently discovered dim star likely passed some 70,000 years ago through our solar system’s distant cloud of comets known as the Oort Cloud. No other star is known to have ever approached our solar system this closely.

Continue Reading

Molecular clouds show off potential, beauty of data visualization

Molecular clouds show off potential, beauty of data visualization

November 21, 2014

“Simulated molecular clouds are beautiful, intricate, and ever-changing — properties that make them ideal candidates for high-powered visualization,” wrote PhD student Erica Kaminski about her award-winning images.

Continue Reading

How stellar death can lead to twin celestial jets

How stellar death can lead to twin celestial jets

February 12, 2014

How do spherical stars evolve to produce highly aspherical planetary nebulae? A Rochester professor and his undergraduate student have a new theory as to why.

Continue Reading

Secret to Peanut-Shaped Star Orbits Peeled Away

Secret to Peanut-Shaped Star Orbits Peeled Away

November 27, 2013

Alice Quillen, professor of astronomy, and collaborators have created a mathematical model of what might be happening at the center of the Milky Way.

Continue Reading

Optimization WordPress Plugins & Solutions by W3 EDGE