Explore BrainMass


Black Holes

Questions on the equation used to calculate the Schwarzschild radius of a black hole... See attached

Right ascension is discussed.

At what time will Galaxy -Cygnus A cross the celestial meridian (along north-south) direction on March 12 and 13 2005?

Optics: Resolving Power

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 a pair of helium nuclei are fused together, the result is, and why?

Light years

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?

Time journey

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?

Declination and right ascension

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

Star Measurements

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