Stellar Pyrotechnics on Display in Super Star Cluster
2 天之前 · The Sloan Digital Sky Survey continues its twenty-year legacy of wide-field optical/infrared imaging and spectroscopy, which has led astronomy into the era of large archives and data science. Harvard and Smithsonian are both full institutional members of the latest epoch of the survey, SDSS-V, which started observations in 2020.
Stellar Astronomy - Harvard–Smithsonian Center for Astrophysics
Stellar astronomy studies the life cycle and structure of stars, both as individuals and as populations. By tracking the commonalities and differences that make stars what they are, we understand the appearance and contents of the visible universe.
Star | Definition, Light, Names, & Facts | Britannica
4 天之前 · star, any massive self-luminous celestial body of gas that shines by radiation derived from its internal energy sources. Of the tens of billions of trillions of stars composing the observable universe, only a very small percentage are visible to the naked eye. Many stars occur in pairs, multiple systems, or star clusters.
Stars - NASA Science
Stars are giant balls of hot gas – mostly hydrogen, with some helium and small amounts of other elements. Every star has its own life cycle, ranging from a few million to trillions of years, and its properties change as it ages. Stars form in large clouds of gas and dust called molecular clouds.
Physicists explain a stellar stream’s distinctive features
2025年1月6日 · Visualizations of well-known stellar streams in the Milky Way can be found here. Astronomers discovered that the spur and gap features of the GD-1 stellar stream cannot be easily attributed to the gravitational influence of known globular clusters or satellite galaxies of the Milky Way. These features could be explained, however, by an unknown ...
Identification of more than 40 gravitationally magnified stars in a ...
2025年1月6日 · Highly magnified individual stars in distant galaxies are useful for a wide range of applications in several astronomy fields, including setting constraints on compact dark matter 3,4,5,6 and self ...
The carbon in our bodies probably left the galaxy and came back …
2025年1月3日 · “The implications for galaxy evolution, and for the nature of the reservoir of carbon available to galaxies for forming new stars, are exciting,” said co-author Jessica Werk, UW professor and chair of the Department of Astronomy. “The same carbon in our bodies most likely spent a significant amount of time outside of the galaxy!”
Stellar Structure and Evolution | Center for Astrophysics
Many of stars’ properties — how long they live, what color they appear, how they die — are largely determined by how massive they are. The study of stellar structure and evolution is dedicated to understanding how stars change over their lifetimes, including the processes that shape them on the inside.
Symphony of stars: The science of stellar sound waves
2018年7月30日 · Understanding these stellar harmonies represents a revolution in astronomy. By "listening" for stellar sound waves with telescopes, scientists can figure out what stars are made of, how old they are, how big they are and how they contribute to the evolution of our Milky Way galaxy as a whole.
A Stellar Circle of Life | Center for Astrophysics | Harvard
2016年11月21日 · Cambridge, MA - A snapshot of the stellar life cycle has been captured in a new portrait from NASA's Chandra X-ray Observatory and the Smithsonian's Submillimeter Array (SMA).