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An astronomer observes two galaxies A and B which have redshifts of:
One reading of people is that they always act out of self-interest and for their own advantage, although they sometimes try to disguise their actions
Suppose a blazar at z=1.00 goes through a fluctuation in brightness that lasts one week (168 hours) as seen from Earth.
How do we calculate or determine the distances to stars? What units do we use and what are the limitations (if any) of the method used for such calculations?
Describe what is meant by redshift and how spectroscopic observations of extragalactic objects may be used to deduce their redshifts.
Our sun rotates in a circular orbit about the center of the Milky Way galaxy. The radius of the orbit is 2.2 1020 m, and the angular speed of the sun
The Sun Rotates around the Milky Way Galaxy at a speed of
To gain full marks you must clearly show your working in any calculation and express your answers to an appropriate number of significant figures.
As you move from the sun , how many of each object is encountered
Three galaxies are aligned along an axis in order A, B, C. An observer in galaxy B is in the middle and observes that galaxies A and C are moving
There are a pair of identical twins. One remains on earth while the other goes on an extended trip through the galaxy.
A spaceship is observed from the Earth to be moving toward a star at a speed of 0.80 c. If the distance from the spaceship to the star is 1.6 ly
Determine the missing values for each different body (1 Newton=0.22 lb, 1 lb =4.54 N). Values should be carried out to 2 decimal places
The telescope on Mount Palomar has a diameter of 200 inches. Suppose a double star were 8.40 light-years away.
An astronomical unit of distance is the light-year, which is the distance light travels in one year. Compute this distance in meters.
Briefly describe three ways that distances to stars can be measured.
The Ha line (Hydrogen) of a certain star is received on Earth at a wavelength of 656 nm. What is the star's radial velocity with respect to the Earth?
Analyze the ways in which your life would change if transistors and microchips were not a part of our everyday lives.
Drawing on Eratosthenes' method, if two observers are due north and south of each other and are separated by 400 km, what is the circumference
Relate how the magnitude scale was originally organized by Hipparchus and how today's astronomers have modified it.
Calculate the Schwarzschild radius of a supermassive black hole of mass 3.7 x 10^6 M., the estimated mass of the black hole at the galactic center
The distance to Polaris, the North Star, is approximately 6.44 x 10^18 m.
Is delta-Capricorni brighter than alpha-Capricorni? How do you know?
A coffee cup on the dashboard of a car slides forward on the dash when the driver decelerates from 42.7 km/hr to rest in 3.72s or less