Why is it not possible to find out what's going on in our nearest star within the span of 24 hours?
Q: Some thing that is 50 km away has an angular size of five arc seconds how tall is the object write…
A: Angular size, θ = 5 second of arc Distance, r = 50 km = 50×103 m Consider height is h. First…
Q: Calculate the number of miles in a light-year, using 1.86 105 mi/s as the speed of light. (Hint:…
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Q: The expanding bubble of hot gas shown in the figure, which has been inflated by the light from a…
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Q: Calculate the number of miles in a light-year, using 1.86 105 mi/s as the speed of light. (Hint: The…
A: The light-year is the unit of length, and it is used to represent the astronomical distance.
Q: given: a (distance to center of galaxy in AU) = 1,717,914,439 AU P (suns orbital period in years)…
A: Given: a (distance to center of galaxy in AU) = 1,717,914,439 AU P (suns orbital period in years) =…
Q: What was the maximum age of the universe predicted by Hubble's first estimate of the Hubble…
A: Hubble's law is the observation in the cosmology regarding the motion of the galaxies away from the…
Q: Galaxy B moves away from galaxy A at 0.519 times the speed of light. Galaxy C moves away from galaxy…
A:
Q: suppose there are three stars in space, each moving at 100 km/s. Star A is moving across9…
A: In this case, all the stars are moving away from the Earth. Therefore, we will observe the redshift.…
Q: an absolute magnitude of -3 is more luminous than an absolute magnitude of-8.
A: Given, Absolute magnitude of objects
Q: What is the maximum luminosity for star of 5.76×1010 Msun.
A: In hydrostatic equilibrium, the radiation pressure and gravitational force will balance each other.…
Q: At rest, hydrogen has a spectral line at 144 nm. If this line is observed at 168 nm for the star…
A: Given that Hydrogen has a spectral line at λ= 144 nm =10-9m This line is observed at λ'= 168 nm=10-9…
Q: Favorite Star Polaris is 132 pc from Earth and has an apparent magnitude of 2.5. What is its…
A: When the brightness of a star is measured there are two ways, Apparent and absolute magnitudes.…
Q: The giant star Betelgeuse has an angular diameter as observed from Earth of about 0.05 arc seconds.…
A: Solution:-
Q: What is the distance in meters to our Sun that is 500 light-seconds away?
A: The time taken by the light to travel from Earth to Sun is t = 500 seconds. Assume the speed of the…
Q: How many parsecs are there in 212 light-years?
A: We know that 1 light year = 0.3066 parsecs
Q: If a star 10 parsecs away from us was moved and appeared to be 4 times brighter after movement, how…
A: Given, d=10 parsecs
Q: A star is observed to have a parallax of 0.05". If we were to send a radio signal towards this star…
A: The parallax angle of a star is observed to be θ=0.05''=0.05 arcseconds. Let the distance to the…
Q: The greatest parallax angle of any star outside our solar system as viewed from Earth is Group of…
A: 1)We know that the parallax angle for the distant star is smaller, and the parallax angle for the…
Q: Galaxy B moves away from galaxy A at 0.541 times the speed of light. Galaxy C moves away from galaxy…
A: We have to use special theory of relativity to solve this problem
Q: How many light years are in one parsec? (Use at least two significant figures)
A: Distance is Note:Convert the distance in units of .
Q: If the Hubble's constant was 100 km/s/Mpc instead of 70 km/s/Mpc what would be the estimated age of…
A: It was observed that the galaxies were moving away from us. Edwin Hubble calculated their recession…
Q: why is it reasonable to suspect that travel between stars is nearly impossible?
A: Somethings are impossible because they violate fundamental laws of nature. Today, we belive that…
Q: Use excel calculator to fill in the missing calculations. 1pc = 3.26 ly Galaxy Andromeda Large Mag.…
A: We need to complete the table in Excel. 1pc = 3.26 lyAlso, 1 ly=9.461e+12 km
Q: One of our closest stars is our Sun, duh. If the distance from Earth to our Sun is 1.56e-05…
A: Solution: The speed of the star is obtained by the Hubble relation, v=H0d…
Q: Most of the dark matter in a galaxy is located in a galaxy's (hint: one word) which allows the…
A: It is a fill in the blank.
Q: Some interstellar Properties. Use excel calculator to fill in the missing figures. 1 ly = 365 × 24 ×…
A: A Table of a list of stars is given with their masses (given in solar masses) and distance to the…
Q: If a neutron star has a radius of 15 km and rotates 748 times a second, what is the speed of the…
A:
Q: If a neutron star has a radius of 12 km and rotates 1,352 times a second, what is the speed at which…
A: radius of neutron star (r) = 12 km = 12000 m angular speed (ω) = 1352 revolutions per second
- Einstein's special relativity explains how speed affects mass, time, and space. As per special relativity, mass can be converted into energy and energy into mass. This relationship is defined using the speed of light.
- When an object reaches the speed of light its mass becomes infinite along with the energy. This implies nothing can move faster than light and the speed of light is considered a cosmic speed limit.
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- To what extent do astronomers have the ability to see into the history of the universe?How many times hotter than our sun is the hottest type O star, which has a surface temperature 40,000 K? Number times hotter =If a neutron star has a radius of 10 km and rotates 716 times a second, what is the speed of the surface at the neutron star's equator as a fraction of the speed of light?
- A supernova in a distant galaxy is observed to be having an absolute magnitude of -19 and an apparent magnitude of 17. Estimate the distance to the galaxy.The right ascension and declination of the seven stars of the Big Dipper are given below: Star Right Ascension Declination Alkaid 13h48m +49° 19' Mizar 13h24m +54°56' Alioth 12h54m +55°58' 12h15m +57°02' 11h54m +53°42' Merak 11h02m +56°23' Dubhe 11h04m +61°45' (1) For what range of latitude are all the stars of the Big Dipper circumpolar? Megrez Phecda3 4 Suppose that someone in the Andromeda galaxy had a super-telescope through which they were looking at Earth right now. They would see Earth A B C D B As it was about 2 ½ million years ago C As it was about 100,000 years ago Which of the following statements about stellar parallax is true? As it will be about 2 ½ million years from now A We observe all stars to exhibit at least a slight amount of parallax. E As it is right now Stellar parallax was first observed by ancient Greek astronomers. 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. The closer a star is to us, the more parallax it exhibits.
- The type of galaxy that consists almost entirely of old stars and is thus less blue (more yellow and reddish) than the other types is [Select] and our Milky Way Galaxy is a [Select] barred spiral elliptical irregular F3 [Select] जी 4 4») Q Search DII de in % 5 spiral all of these galaxy types consist mostly of very old stars A 2 LO F7 & 7 PrtScn 8 Home P EndWhat would the angle between the Sun and the Earth be if the solar system were viewed from a distance of 1 pc?T/ F The distance unit best for interstellar distances is the light-year. ___ The distance unit best for intergalactic distances is the mega-parsec. ___
- Calculate the number of miles in a light year using (see picture for the equation) mi/s as the speed. Hint: The number of seconds in a year,365days,will be useful.If Jim could drive a Jetson's flying car at a constant speed of 330 km/hr across oceans and space, approximately how long (in millions of years, in 106 years) would he take to drive to a nearby star that is 8.7 light-years away? Use 9.461 × 1012 km/light-year and 8766 hours per year (365.25 days).