Q: A star has a parallax angle of 0.0270 arcseconds and an apparent magnitude of 4.641. What is the…
A: a. A star has a parallax angle of 0.0270 arcseconds and an apparent magnitude of 4.641. What is the…
Q: What is the distance in parsecs to Vega, which has an annual parallax of 0.129 arcsec.
A: Annual parallax (p), p=0.129 arcsec
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Q: Earth is about 150 million kilometers from the Sun, and the apparent brightness of the Sun in our…
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Q: The star Spica is observed to have a parallax of 0.012000. How far away is it in parsecs answers to…
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Q: the parallax angle of a star to be 0.002 arc-seconds. what would the distance be to this star?
A: Given, Parallax angle, p=0.002 arc-seconds
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A: Luminosity of star (L) = 7×1026 watt Apparent brightness (AB) = 4×10-12 Wm2
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Q: is
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Q: Suppose a star has a luminosity of 7.0x1026 watts and an apparent brightness of 4.0x10-12 watt/m?.…
A: Given: The luminosity is 7x1026 W. The apparent brightness is 4x10-12 W/m2.
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Q: On Earth, the parallax angle measured for the star Procyon is 0.29 arcseconds. If you were to…
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Q: What is the distance to a star with a parallax angle of 0.5 arcseconds? A. 5 parsecs B. 15 parsecs O…
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A: Given information:The distance between Earth and the alpha Centauri = 4.29 light years (ly).
Q: what is the apparent magnitude of the sun as eeen from Saturn about 10AU away?
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Q: The Algol binary system consists of a 3.7 Msun star and a 0.8 Msun star with an orbital period of…
A: The Algol binary system consists of a 3.7 Msun star and a 0.8 Msun star with an orbital period of…
Which of the following is largest?
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- The type of star that does not currently exist because our universe is not old enough is a a. red dwarf. b. white dwarf. c. brown dwarf. d. black dwarf.Which of the following WOULD NOT characterizes the type(s) of star we would find at g, m, n, o, and p on the Hertzsprung-Russel Diagram (Figure 4) a. are all smaller than q,i,h. b. fuse hydrogen into helium. c. are called, “the main sequence”. d. fuse He into heavier elements. e. get smaller towards the right sideWhich of the following statements about stellar parallax is true? A. We observe all stars to exhibit at least a slight amount of parallax. B. Stellar parallax was first observed by ancient Greek astronomers. O C. The amount of parallax we see depends on how fast a star is moving relative to us. D. It takes at least 10 years of observation to measure a star's parallax. OE. The closer a star is to us, the more parallax it exhibits.
- Star X has an apparent magnitude of 0.03 and an absolute magnitude of 0.6. If it were moved to be twice as close to Earth as it is now, which of the following would occur? A. apparent magnitude number would decrease O B. absolute magnitude number would increase C. absolute magnitude number would decrease O D. apparent magnitude number would stay the same E. apparent magnitude number would increaseWhich type of star would be the largest? a. M b. O c. B d. K e. AGiant and supergiant stars are 10 to 1,000 times larger in diameter than the sun and a. are half as dense. b. 10 to 106 less dense. c. are the same density. d. are twice as dense. e. 10 to 106 more dense.
- Considering absolute magnitude M, apparent magnitude m, and distance d. Compute the unknown for each of these stars: a. m = +1.6mag, d = 4.3pc. What is M? b. M = -14.3 mag, m = 10.9 mag. What is d? c. m = -5.6mag, d = 88pc. What is M? d. M = 0.9mag, d = 220pc. What is m?What type of star has the longest life span? a. O b. K c. B d. A e. MAbsolute visual magnitude is a. the apparent magnitude of a star observed from Earth. b. the luminosity of a star observed from a distance of 1,000 pc. c. the apparent magnitude of a star observed from a distance of 10 pc. d. the luminosity of a star observed from Earth. e. c and d.
- What is the distance to a star with a parallax angle of 0.5 arcseconds? A. 5 parsecs B. 15 parsecs O C. 2 parsecs D.0.2 parsecs E. none of the aboveWhich of the following spectral classes has stars with the hottest temperature? a. F0 b. F5 c. A0 d. A5 e. A94. The star Procyon has an absolute magnitude of 2.65. The Sun has an absolute magnitude of +4.82. How much brighter is Procyon than the Sun?