What Is The Composition Of A Protostar? The gas is mostly made up of atoms of hydrogen, though small amounts of heavier elements can be found floating through space, as well. In some places, the interstellar medium is collected into a big cloud of dust and gas called a nebula. How a protostar is formed?
What Occurs During The Protostar Stage Of Star Formation? During the time a dense core is contracting to become a true star, but before the fusion of protons to produce helium begins, we call the object a protostar. Figure 7: Formation of a Star. (a) Dense cores form within a molecular cloud. What is the
Who Was The Astronomer Who Is The H In HR Diagram? One of the most useful and powerful plots in astrophysics is the Hertzsprung-Russell diagram (hereafter called the H-R diagram). It originated in 1911 when the Danish astronomer, Ejnar Hertzsprung, plotted the absolute magnitude of stars against their colour (hence effective temperature). Who were the
Who Made The HR Diagram? Of great importance to theories of stellar evolution, it evolved from charts begun in 1911 by the Danish astronomer Ejnar Hertzsprung and independently by the U.S. astronomer Henry Norris Russell. What is the H-R diagram based on? Developed independently in the early 1900s by Ejnar Hertzsprung and Henry Norris Russell,
What Type Of Star Is T Tauri? Named for the first of their type observed, T Tauri stars are variable stars which show both periodic and random fluctuations in their brightnesses. They are newly-formed (< 10 million years old) low to intermediate mass stars (< 3 solar masses) with central temperatures too low for nuclear
How Old Is The Oldest Globular Star Cluster? NGC 121 is around 10 billion years old, making it the oldest cluster in its galaxy; all of the SMC’s other globular clusters are 8 billion years old or younger. How old is the oldest star cluster? Astronomers Have Found One of The Universe’s Oldest Star Clusters
How Old Is A Blue Dwarf Star? In the present-day universe, a blue dwarf is a hypothetical object whose existence is predicted based on theoretical models because the current universe is far too young for any blue dwarfs to have formed. A 0.1 solar mass M-dwarf has a main-sequence lifespan of more than 6 trillion
What Will Decide The Amount Of Time A Star Spends In The Main Sequence Phase? The length of time a star spends in the main sequence phase depends on its mass. “Constructing a plot, called the HR diagram, of the stars in the cluster, scientists can determine the mass of the stars that are just
Which Of These Star Clusters Is Oldest? A team of astronomers using the Gemini-South telescope has discovered one of the oldest stellar clusters in the Milky Way. The team’s results date the globular cluster, named HP 1, at about 12.8 billion years, making its stars among the oldest ever found in our Galaxy. Which star
What Are The Elements Of Stellar Evolution? Carbon plus helium produces oxygen. Oxygen plus helium produces neon. Neon plus helium produces magnesium. Magnesium plus helium produces silicon. Silicon plus helium produces sulfur. Sulfur plus helium produces argon. Argon plus helium produces calcium. What are the 6 steps of stellar evolution? Step 1: Large cloud of