Astronomy | Astrophysics Answers

A Rocket has a mass given by m-ct where it has hurt for a time t, the relative backward velocity of the gass is Vr ol if it burns out a mass 1/2 where it is fired vertically from rest neglecting air resistance find the height reached and velocity when it is burn out completely.

A Rocket has a mass given by m-ct where it has hurt for a time t, the relative backward velocity of the gass is Vr ol if it burns out a mass 1/2 where it is fired vertically from rest neglecting air resistance find the height reached and velocity when it is burn out completely.

A young star with a luminosity 150L⊙ outflow velocity of 30 km s−1, and a mass loss rate of M ̇ = 10−4M⊙ yr−1 Does radiation pressure play a role in driving the outflow?

Assess the stability of Barnard 68. State all assumptions and explain all calculations used in your reasoning

>How close would pre-stellar nebula of radius 200 AU have to be in order to have the same angular diameter as the 6 degree diameter of the Andromeda Galaxy as seen from earth? Calculate the apparent magnitude of the central star if it had a luminosity 10 times that of the sun.

Mercury orbits the sun at a distance of 0.4 AU. What is mercury’s orbital period in earth years? Keplers’s Third Law : T^2=d^3. T: orbital period in earth year. D: distance to sun in astronomical units. 1 AU=150,000,000 or 1.5x10^8 km.

Mercury orbits the sun at a distance of 0.4 AU. What is mercury’s orbital period in earth

years? Keplers’s Third Law : T^2=d^3. T: orbital period in earth year. D: distance to sun

in astronomical units. 1 AU=150,000,000 or 1.5x10^8 km.

Mercury orbits the sun at a distance of 0.4 AU. What is mercury’s orbital period in earth

years? Keplers’s Third Law : T^2=d^3. T: orbital period in earth year. D: distance to sun

in astronomical units. 1 AU=150,000,000 or 1.5x10^8 km.

Astronauts in orbit are apparently weightless. This means that a clever method of measuring the mass of astronauts is needed to monitor their mass gains or losses, and adjust their diet. One way to do this is to exert a known force on an astronaut and measure the acceleration produced. Suppose a net external force of 50.0 N is exerted, and an astronaut's acceleration is measured to be 0.893 m/s (a) Calculate her mass. (b) By exerting a force on the astronaut, the vehicle in which she orbits experiences an equal and opposite force. Discuss how this would affect the measurement of the astronaut's acceleration. Propose a method by which recoil of the vehicle is avoided.

Relationship of the moon to the others (earth, sun) in essay format with references.