PPT-If the stars in a binary-star system

are relatively widely separated their evolution proceeds much as it would have if they were not companions If they are closer it is possible for material to transfer from one star to another . do not live alone. B. ackground Design E. . Buunk. / S.E. de Mink, . HST image: NASA . Paresce. Selma E. de Mink. Hubble Science Briefing . , . February 7, 2013. Hubble Fellow at Space Telescope Science Institute / Johns Hopkins University. What are stars?. Stars are balls of hot gas.. They are much larger than planets. and much further from Earth.. The sun is the closest star to Earth.. Most of the gas in the inside of a star is hydrogen and its temperature is over 20 million degrees Fahrenheit. There is also helium, a gas that is formed when the hydrogen molecules join together.. The Sun and the Stars. The Sun and the Stars. Binary stars:. Most stars are found in binary or multiple systems.. Binary star systems consist of 2 stars which are gravitationally bound with each star. Christopher W. Ashcraft M.S., M.Ed.. Big Bang vs. Creation. Origin of Stars. Solar System: Evidence of Design. Age of the Cosmos. Are we being told all the evidence or just selected information to support a particular idea?. Stars born with more than 8 — 10 M.  . cannot . lose enough mass to become white dwarfs. . These stars die by supernova explosions.. Ignition of “metals”. The core of an old high-mass star gets little . The Sun and Other Stars. A . star. is a huge ball of superheated gases. . The sun is a star in the center of our solar system. The source of most of the energy on Earth- we would not exist without it. Theory & Observations. Hovik Grigorian. Yerevan State University. Summer School Dubna – 2012. Compact stars Physics. • physics of compact stars,. • astrophysics of compact stars,. • . due Monday – this covers stars, Chapter 10. Practice problems: . Problem sets 6A and 6B. Upcoming schedule: we’ll . start . Chapter 11 on Monday. Announcements. Astronomy 103. The Stars. Please read chapter 10. of . planetary nebulae, . jets and cosmic . outbursts. Orsola De . Marco. Macquarie University. Collaborators: . Jan Staff (Florida State). Jean-Claude Passy (Bonn U). Roberto Iaconi (Macquarie U). Todd . Distances:. Parallax Detected!. . The Problem Faced by Astronomers. [cast your mind back to the 1700s and 1800s]. There are . hundreds of thousands . of stars visible through small telescopes. Only a tiny fraction of them will display measureable heliocentric parallax -- and you don’t know which they are!. constellations. a. Ancient cultures used . mythology. or everyday items to name constellations. 2. Modern astronomy studies . 88 . constellations. 3. Some constellations are not . visible. all year because Earth revolves around the Sun. Stars 1. Patterns of stars – constellations a. Ancient cultures used mythology or everyday items to name constellations 2. Modern astronomy studies 88 constellations 3. Some constellations are not 20.11. 1. Neutron stars. T. he . remains of cores of some massive stars that have become supernovae. .. Cores are . a degenerate gas of mostly neutrons.. So much compression at each stage of core contraction that final radius is . A . star is a massive ball of plasma that emits . light and electromagnetic energy . throughout the universe. . While . there is only one star in our solar system, there are billions upon billions of stars throughout our galaxy and exponentially more in the billions of galaxies in the universe.