how do 21 cm radio observations reveal the rotation of the Milky Way galaxy?
Actually, 21 cm is a radiation spectrum. From this spectrum, we can see that hydrogen clouds on one side are moving away from us and on other side, they are moving towards us. Therefore, velocities can be measured from this and hence we can know about the rotation of galaxy .
The 21 cm line tells us where the hydrogen in a galaxy lies, and as that hydrogen rotates toward or away from us relative to the central red shift of the galaxy, it results in Doppler shift.
how do 21 cm radio observations reveal the rotation of the Milky Way galaxy?
The first observations that gave us a sense of the true size of
our Milky Way Galaxy and the location of the sun in it were those
of open clusters.
TRUE OR FALSE?
The first observations that gave us a sense of the true size of our Milky Way Galaxy and the location of the sun in it were those of open clusters. Select one: OTrue False
The first observations that gave us a sense of the true size of...
Astronomical observations of our Milky Way galaxy indicate that it has a mass of about 8.0 x 1011 solar masses. A star orbiting near the galaxy's periphery is 5.7 x 104 light-years from its center. (a) What should the orbital period (in y) of that star be? 24.2e6 ху (b) If its period is 5.1 x 107 years instead, what is the mass (in solar masses) of the galaxy? Such calculations are used to imply the existence of other matter,...
The first observations that gave us a sense of the true size of
our Milky Way Galaxy and the location of the sun in it were those
of open clusters.
TRUE OR FALSE?
The first observations that gave us a sense of the true size of our Milky Way Galaxy and the location of the sun in it were those of open clusters. Select one: OTrue False
Astronomical observations of our Milky Way galaxy indicate that it center. (For your calculations, assume that the galaxy's mass is concentrated near its center.) has a mass of about 8 × Ό11 solar masses. A star orbiting near the galaxy S periphery. S ,, e İ-lit ears or ts (a) What should the orbital period of that star be? yr If its period is 6.7 x ǐ07 years instead, what is the mass of the galaxy? Such calculations are used...
Astronomical observations of our Milky Way galaxy indicate that it has a mass of about 8.0×1011 solar masses. A star orbiting on the galaxy’s periphery is about 6.0×104 light years from its center. What should the orbital period in years of that star be? (You do not need to enter any units.) 2.61×108 yr ¡Correcto! Su recibo es 160-1991 Intentos Anteriores If its period is 5.0×107 light years instead, what is the mass of the galaxy in solar mass? Such...
The galaxy Palioxis is receding from the Milky Way at a speed of 0.35c. Another galaxy, Euthenia, is receding from the Milky Way in exactly the opposite direction, but at a speed of 0.45c. (a) For an observer in Palioxis, how fast is the Milky Way receding from them? Explain from them? Explain (b) For an observer in Palioxis, how fast is Euthenia receding f Imagine two muons, symbol μ-, moving towards each other with equal and opposite speeds. If...
Astronomical observations of our Milky Way galaxy indicate that it has a mass of about 8.0x10^11 solar masses. A star orbiting near the galaxy's periphery is 6.0X10^4 light years from its center. (For your calculations, assume that the galaxy's mass is concentrated near its center.) (a) What should the orbital period of that star be in yr ? (b) If its period is 6.0 x 10^7 years instead, what is the mass of the galaxy? Such calculations are used to...
Astronomers have observed a small, massive object at the center of our Milky Way galaxy. A ring of material orbits this massive object; the ring has a diameter of about 10 light years and an orbital speed of about 210 km/s . A) Determine the mass of the massive object at the center of the Milky Way galaxy. Give your answer in kilograms. B) Give your answer in solar masses (one solar mass is the mass of the sun). C)...
For each of the following distances, if a galaxy the size of the Milky Way (about 30.1 kpc in diameter) were at that distance from the Milky Way, what would its angular size appear to be? 11.7 Mpc - a = --- arc minutes 1034 Mpc- a = ---arc mintues
For each of the following distances, if a galaxy the size of the Milky Way (about 30 kpc in diameter) were at that distance from the Milky Way, what would its angular size appear to be? a. 11.7 Mpc α = _____ arc minutes b. 1079 Mpc α = _____ arc minutes