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Astrophysics Questions and Answers (Q&A)

How far is UY Scuti from Earth?
John F. connor, Content Marketing executive
Answered: Feb 08, 2019
UY Scuti is the largest known star. This star was discovered by German astronomers in 1860. Yet it was in 2012 that the actual size of UY Scuti was documented. It's radius is between 1,054...Read More

2 Answers

667 views
Which is the largest star in the Milky Way?
Anthony Paul Bonadio, Teacher
Answered: Jan 31, 2019
The VY Canis Majoris is the largest among all of the stars in the Milky Way. Found in the constellation Canis Major by the French astronomer Jerome Lalande, this red Hypergiant star is calculated...Read More

3 Answers

643 views
What is Tolman-Oppenheimer-Volkoff limit?
L. Sevigny, Doctor
Answered: Jan 24, 2019
It's an upper bound to the mass of cold, nonrotating neutron stars, analogous to the Chandrasekhar limit for white dwarf stars. Observations of GW170817, the first gravitational wave event due to...Read More

2 Answers

491 views
What are star clusters?
John F. connor, Content Marketing executive
Answered: Feb 08, 2019
Star clusters are groups of stars that have the same origin and are bound together by a gravitational bond for some time. This helps astronomers to study about stellar evolution and ages....Read More

3 Answers

441 views
What is the Hertzsprung-Russell diagram?
John F. connor, Content Marketing executive
Answered: Feb 08, 2019
The Hertzsprung-Russell diagram (H-R Diagram) was developed by Ejnar Hertzsprung and Henry Norris Russell in 1900s to study the stellar evolution. The diagram shows the absolute magnit...Read More

2 Answers

371 views
What is the difference between electron and neutron degeneracy pressure?
John F. connor, Content Marketing executive
Answered: Feb 08, 2019
Neutron degeneracy pressure, which is a stellar application of the Pauli Exclusion Principle, is actually "stronger" than electron degeneracy pressure, which is also a stellar applic...Read More

2 Answers

356 views
Why do stars turn into supernovas?
Anthony Paul Bonadio, Teacher
Answered: Jan 31, 2019
Between two huge gravitational forces, a star's always in flux. On one side, the star's gravity’s crushing force tries to squeeze the stellar material into the smallest and tightest ball...Read More

3 Answers

329 views
Why does a star grow from a small star to a red giant?
Y. Dawne, Content Blogger
Answered: Feb 07, 2019
Red giants are evolved from main-sequence stars with masses in the range from about 0.3 to around 8. When a star begin to form from a collapsing molecular cloud, it contains primarily hydr...Read More

2 Answers

325 views
What happens when small stars run out of fuel?
John F. connor, Content Marketing executive
Answered: Feb 08, 2019
A star, like our sun, burns hydrogen into helium. It later burns even heavier elements, and the star’s end comes, expelling its outer layers and has its inner core either contract or...Read More

2 Answers

323 views
What are black dwarf stars?
A. Cook, English Professor
Answered: Jan 30, 2019
Hypothetical and unlike red dwarfs, brown dwarfs, and white dwarfs, a black dwarf is a stellar remnant. It's specifically a white dwarf that has cooled sufficiently that it no longer emits...Read More

2 Answers

320 views
How much solar mass must a remnant have to become a black hole?
A. Cook, English Professor
Answered: Jan 30, 2019
A black hole, in the theory of general relativity, can be composed of any mass. If the mass is low, the higher the matter's density has to be in order for a black hole to be created. There are no...Read More

3 Answers

317 views
What do you know about the Chandrasekhar limit?
John F. connor, Content Marketing executive
Answered: Feb 08, 2019
The maximum mass of a stable white dwarf star is called the Chandrasekhar limit . The currently accepted value of the Chandrasekhar limit is about 1.4 solar masses. The limit was named aft...Read More

2 Answers

306 views
What star remnant is formed after a supernova?
John F. connor, Content Marketing executive
Answered: Feb 08, 2019
After a supernova explosion, a number of things that can be left behind, because the star’s center, or core, collapses in less than a second. The star’s outer layers of the sta...Read More

2 Answers

304 views
What is the minimum size that a star needs to be to undergo a supernova?
L. Sevigny, Doctor
Answered: Jan 24, 2019
There are two main types of supernova. Type Ia happens when a white dwarf star accumulates too much mass from its companion in a binary star system, while Types II and Ib/c caused when a massive...Read More

2 Answers

298 views
What is stellar nucleosynthesis?
John F. connor, Content Marketing executive
Answered: Feb 08, 2019
Nucleosynthesis is the process by which atomic nuclei are created from pre-existing nucleons like protons and neutrons. Some of the major types of nucleosynthesis are, Explosive Nucleosynthesis,...Read More

2 Answers

273 views

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