UNIVERSE (LOOSELEAF):STARS+GALAXIES
6th Edition
ISBN: 9781319115043
Author: Freedman
Publisher: MAC HIGHER
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Chapter 20, Problem 51Q
To determine
The reason for supernova SN 1987A was important to astronomers and the way it was different from other typical supernovae.
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Explain what makes the planetary nebula glow and what makes the supernova remnant glow. Which of these two kinds of gas clouds continues to glow for a longer time and why?
A Type Ia Supernova is an example of a:
(a)What type of supernova is most luminous in light?
(b) What kind of star results in such an explosion?
(c) What type of supernova is most luminous in neutrino emission?
(d) What kind of star results in such an explosion?
Chapter 20 Solutions
UNIVERSE (LOOSELEAF):STARS+GALAXIES
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- How would the spectra of a type II supernova be different from a type Ia supernova? Hint: Consider the characteristics of the objects that are their source.arrow_forwardWhat observations from SN 1987A helped confirm theories about supernovae?arrow_forwardHow do the two types of supernovae discussed in this chapter differ? What kind of star gives rise to each type?arrow_forward
- A supernova remnant is now 4.75 pc in radius and is expanding at 1,600 km/s. Approximately how many years ago did the supernova occur? (Note: 1 pc = 3.1 1013 km and 1 yr = 3.2 107 s.)arrow_forwardA distant Nebula is now 2.35 pc in radius and is expanding at 1100 km/s. Approximately when did the supernova occur?arrow_forwardA supernova can eject material at a velocity of 10,000 km/s. How long would it take a supernova remnant to expand to a radius of 1 AU? How long would it take to expand to a radius of 1 light-years? Assume that the expansion velocity remains constant and use the relationship: expansiontime=distanceexpansionvelocity .arrow_forward
- Where in the Galaxy would you expect to find Type II supernovae, which are the explosions of massive stars that go through their lives very quickly? Where would you expect to find Type I supernovae, which involve the explosions of white dwarfs?arrow_forwardLook at the list of the nearest stars in Appendix I. Would you expect any of these to become supernovae? Why or why not?arrow_forwardWould you be more likely to observe a type II supernova (the explosion of a massive star) in a globular cluster or in an open cluster? Why?arrow_forward
- Would you expect to find any white dwarfs in the Orion Nebula? (See The Birth of Stars and the Discovery of Planets outside the Solar System to remind yourself of its characteristics.) Why or why not?arrow_forwardHow does a white dwarf differ from a neutron star? How does each form? What keeps each from collapsing under its own weight?arrow_forwardIf the formation of a neutron star leads to a supernova explosion, explain why only three of the hundreds of known pulsars are found in supernova remnants.arrow_forward
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