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what is the size of an object located at a distance10 km if it has an angular size a of 2 degrees and use hubbles law
if a galaxy has a luminosity of 66x1039 w and a brightness measured as 125x10-11 w m-2 how far away is the galaxy in
suppose a blazar at z100 goes through a fluctuation in brightness that lasts one week 168 hours as seen from eartha at
the andromeda galaxy also known as m31 is the nearest spiral galaxy to the milky way and the most distant object
1 what is the significance of studying active versus normal galaxies explain2 do you think that our galaxy has ever
need help with the following questions by describing the evolution of earth the sun the moon planets and other bodies
the gas shell of a planetary nebula is expanding away from the central star at 20 kms the nebula currently has a
1 do all stars emit the same energy throughout the electromagnetic spectrum2 an h-r diagram plots luminosities of stars
i briefly explain why a star of mass 05a1 collapses to form a white dwarf when the nuclear reactions in its core
1 explain why the absorption lines of an element have the same wavelengths as the emission lines of that element2 make
problem 1 bob is watching anna y by in her high-speed plane which anna knows to be 70 m in length as a greeting anna
a briefly describe three ways that distances to stars can be measuredb name an object not man made that emits light in
a newtonian telescope uses a curved mirror to focus light from a star a flat mirror called a secondary mirror
each capacitor in the following configuration is 600 mfwhat is the equivalent capacitance between points a and bif a
friederich bessel suspected that the star 61 cygni scarcely visible with the naked eye might be one of our closest
the sun is primarily composed of hydrogen and helium with traces of other elements its visible surface the photosphere
1thoroughbred horse are among the fastest horses in the world and are used in famous racing events such as the kentucky
question 1 the great circle passing through the south point on the horizon the zenith and the north point on the
outline the three general network topologies bus ring and star describe the components devices and arrangement of
q1 what was the underlying principle for the formulation of periodic tableq2 what are the various properties showing
a starbust galaxy like m82 drives a strong galactic wind made up of matter leaving the galaxy which events inside the
because of the presence of jupiter the sun moves in a small orbit of radius 742000 km with a period of 1186 yearsa
the two components of a double star are observed to move in circles of radii r1 and r2 what is the ratio of their
1 in what order are the bayer letters assigned to stars2 is delta-capricorni brighter than alpha-capricorni how do you
a calculate the schwarzschild radius of a supermassive black hole of mass 37 x 106 m the estimated mass of the black