A pulsar is a rapidly rotating neutron star that continuously emits a beam of radio waves in a searchlight manner. Each time the pulsar makes one revolution, the rotating beam sweeps across the earth, and the earth receives a pulse of radio waves. For one particular pulsar, the time between two successive pulses is 0.020 s. Dete
This job compares the main sequence life spans of low mass stars and high mass stars. It also explains why they are so different.
Compare the Sun with two other stars. Create a table comparing luminosity, distance from Earth, temperature, and mass. Based on this information state whether you think the comparison star is older, younger, or about the same ages as the Sun.
Neutron stars, such as the one at the center of the Crab Nebula, have about the same mass as our sun but a much smaller diameter. If you weigh 655 N on the earth, what would you weigh when at the surface of a neutron star that has the same mass as our sun and a diameter of 16.0 km? Take the gravitational constant to be G =
The temperature in a star of conductivity 5 is inversely proportional to the distance from the center: . If the star is a sphere of radius 3, find the rate of heat flow outward across the surface of the star.
At the surface of a distant star, the temperature is approximately 6500 K. a) How much energy is contained in the electromagnetic radiation filling a cubic meter of space at the star's surface? b) Sketch the spectrum of this radiation as a function of photon energy. Mark the region of the spectrum that corresponds to vi
See attached file. Distance from sun Number of stars Number of dwarf galaxies Number of large galaxies Number of galaxy group Number of superclusters 1 ly 5 ly 12.5 ly 20 ly 50 ly 250 ly 5,000 ly 50,000 ly 500,000 ly 5,000,000 ly 100 million ly 1 billion 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 when it is not a whole number. http://hyperphysics.phy-astr.qsu.du/hbase/vesc.html#ves Use the following applet to calculate the escape velocity. Do not use commas when putting numbers into
Why do you think it was so difficult for people to accept the heliocentric model in the 1600s? And what do you think was the impact of this model, once it was accepted?
See attached file for full problem description.
12) The Sun is primarily composed of hydrogen and helium, with traces of other elements. Its visible surface, the photosphere, is a dense and nearly opaque gas at a temp of 6000 K. Describe the spectrum that originates at this surface, due to the physical state of the material. Explain how the spectrum arises.
7) Friederich Bessel suspected that the star 61 cygni, scarcely visible with the naked eye, might be one of our closest neighbors. He was able to measure the total angular shift of 61 cygni, arising from the earth's orbital motion, as 0.628 arc seconds. Taking the average distance of the earth from the sun as 149.6 million km, c
Please see attached, but the basic problem is how to rearrange the viral theorem into a form that describes the time taken for a star of uniform density and constant luminosity to reach its current radius. on the attachment are some of my notes on what i need to consider, please can you show me the full working to help me unders
See the attached file. A Newtonian telescope uses a curved mirror to focus light from a star. A flat mirror called a secondary mirror intercepts the converging light and redirects the light 90 degrees to the side of the telescope for viewing. See attachment. Determine the minimum size for the secondary mirror so that it coll
5/3 and 5/4 are the two given. Can you find the other regular star polygons with fewer than 10 vertices?
Each capacitor in the following configuration is 6.00 mF. (Refer to attached picture file). What is the equivalent capacitance between points a and b? If a battery of voltage 35.0 volts is connected across points a and b, what voltage will appear across the capacitor identified with a star? If a battery of voltage 35.
Questions on the equation used to calculate the Schwarzschild radius of a black hole... See attached
At what time will Galaxy-Cygnus A cross the celestial meridian (along north-south) direction on March 12 and 13 2005?
1. The telescope on Mount Palomar has a diameter of 200 inches. Suppose a double star were 8.40 light-years away. Under ideal conditions, what must be the minimum separation of the two stars for their images to be resolved using light of wavelength 550 nm? (Unit: m) All answers must have three significant digits unless other
If thermonuclear fusion in the Sun were suddenly to stop, what would eventually happen to the overall radius of the Sun? Justify your answer using the ideas of hydrostatic euqillibrium and thermal equillibrium.
If a pair of helium nuclei are fused together, the result is, and why?
A mortar fires a shell of mass m at speed v0. The shell explodes at the top of its trajectory (shown by a star in the figure) as designed. However, rather than creating a shower of colored flares, it breaks into just two pieces, a smaller piece of mass 1/5 m and a larger piece of mass 4/5 m. Both pieces land at exactly the same
An astronomical unit of distance is the light-year, which is the distance light travels in one year. Compute this distance in meters. How many meters away is a star at a distance of 4 light-years from the earth?
What is difference between apparent solar day, mean solar day and a sidereal day?
A spacecraft, traveling at a typical attainable speed of about 25,000 kilometers per hour, leaves Earth and travels toward the closest star system to Earth, the Alpha Centauri system. The time for journey would be about how many years?
Suppose that a binary star system consists of two stars of equal mass. They are observed to be separated by 359 million km and to take 4.50 earth years to orbit about a point midway between them. What is the mass of each?
I'm stuck on this multiple choice question: Which of the following could be the equitorial co-ordinates of a star that rises to the south of east when viewed from 48 degrees north latitude, and 88 degrees west longitude? a declination 60, right ascension 13 hours b declination 30, right ascension 6 hours c declination -3
A.) Briefly describe three ways that distances to stars can be measured. b.) Name an object, not man made , that emits light in pulsars similar to those from a pulsar. Any wavelegnth is okay. Could we detect these pulses if they came from Jupiter? From a nearby star? c.) Name a type of expansion (or expanding object) that
Compare the stars found in the galactic disk (where the sun is located), also known as Population I stars, with the stars in the halo of our galaxy, known as Population II stars. **** Minimum 100 words - Cite all sources / urls
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?