Solar System Grazed by Star 70,000 Years Ago, Researchers Say

 

Proxima Centauripic

Proxima Centauri
Image: earthsky.org

As a passionate member of the natural science community, Valerie Varnuska of Westbury, NY, enjoys reading about astronomy. Astronomy buffs like Valerie Varnuska are often the first to become aware of new developments in the study of space, including its history, current happenings, and new discoveries.

While many think of stars as unmoving celestial bodies, recent research indicates that a red dwarf star called Scholz’s star came within one light year of our solar system approximately 70,000 years ago. For perspective, this is more than four times closer than the sun’s current closest neighbor, Proxima Centauri.

The first research suggesting this phenomenon looked at the star’s current motion and velocity and extrapolated backward. Other research coming from the Complutense University of Madrid, however, looked at the hyperbolic, or V-shaped, orbits of some objects within the solar system. Many of these objects are projected in the direction of the constellation of Gemini, which would fit the model of an encounter with Scholz’s star. This close encounter does not explain all objects on hyperbolic orbits, however, which means other explanations are necessary to capture the full picture of unusual objects in the solar system.

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Understanding Meteoroids and Shooting Stars

 

Meteoroids and Shooting Stars pic

Meteoroids and Shooting Stars
Image: space.com

Based in Westbury, NY, Valerie Varnuska has an appreciation for the outdoors and enjoys exploring the natural landscape around her. Valerie Varnuska also maintains a strong interest in stargazing and enjoys learning about the principles of astronomy that define natural phenomena across the universe.

Seeing a shooting star is a memorable experience for stargazers of all ages. Despite the name, however, this phenomenon does not actually involve any stars. The streaks of light are due to meteoroids, which are composed of tiny rock and dust particles that burn up as they enter the Earth’s atmosphere. The trail of light that forms is called a meteor, while remaining objects that survive entry into the atmosphere and land on terra firma are known as meteorites.

Meteor showers are common at specific times of the year when the Earth, during its orbit of the Sun, passes through a debris trail that has been left behind by an orbiting comet. These showers take their names from the constellation that inhabits the area of the night sky where the shooting stars appear. For example, the Leonid Meteor Shower originates in the part of the sky inhabited by Leo.

NASA Telescope Discovers Nearly 100 New Planets

NASA Telescopepic

NASA Telescope
Image: nasa.gov

A resident of Westbury, NY, Valerie Varnuska likes to enjoy the outdoor environment while taking part in activities such as hiking, walking, and stargazing. In addition to exploring nature trails near Westbury, NY, Valerie Varnuska holds a keen interest in astronomy and learning about new astrological discoveries. Recently, NASA discovered 95 new planets beyond our solar system.

The newly discovered exoplanets (planets existing outside our solar system) were observed using NASA’s Kepler telescope and vary from Earth- to Jupiter-sized. The telescope located the planets while orbiting the earth, providing views of different parts of the sky along with recordings of fluctuations in light levels caused by exoplanets crossing in front of the stars they orbit.
Researchers are analyzing data provided by the telescope to differentiate between fluctuations caused by the movement of exoplanets and those caused by other sources.

Exoplanet explorers hope to discover other Earth-sized planets that may have the capacity to host life. Future space missions intended to help find such planets include the Transiting Exoplanet Survey Satellite and NASA’s James Webb Space Telescope.

The Creation of a Unified System of Constellations

 

Constellations pic

Constellations
Image: space.com

Valerie Varnuska of Westbury, NY, is passionate about the natural world. Fascinated by the beauty of the night sky, Valerie Varnuska has a strong interest in astronomy and natural phenomenon beyond the earth.

A recent article on Space.com examined the development of constellations, the naming of a group of stars that form a recognizable pattern, which began formally in 2nd-century BC Greece with Hipparchus’ 48 classical constellations. These constellations had their roots in ancient Babylon and included some obvious star clusters that had been independently recognized by cultures around the world.

Several decades later, Ptolemy created the Almagest catalog of constellations, which was passed down virtually intact to modern Europeans. Additions included 14 new constellations visible only to seafarers as they explored the Southern Hemisphere. In the 1930s, a formal set of 88 constellations was codified worldwide through the efforts of the International Astronomical Union.

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