Astronomy | Astrophysics Answers

Mars has an albedo of 15% Given that it doesn't have much of an atmosphere, estimate the mean surface temperature on Mars. Note: the semimajor axis of the orbit of Mars is 1.52 AU. (Please enter your answer in units of Kelvins.)

What are the various parameters that considered while launching the satellite in orbit?

if we have mass rotating in a system, why would potential only depend on r on large radius

What is neutron star?

use the diagram to show the three main types of galaxies

Ø A proton travels with a speed of 5.02´10⁶ m/s in a direction that makes an angle of 60.0° with the direction of a magnetic field of magnitude 0.180 T in the positive x direction. What are the magnitudes of: a) Magnetic force on the proton. b) The proton's acceleration?

1. During much of the powered phase of the maximum altitude flight, Joe Walker maintained the X-15 at a climb angle of 32 degrees l. When the rocket propellant ran out, the X-15 was climbing through 176,000 feet at a flight velocity of 5600 ft/s. Calculate the rate of climb at the time of engine burnout.

2. The thrust of the XLR99 rocket engine was essentially constant at 57,000 lb during the powered phase of the X-15 flight. For the maximum altitude flight on August 22,1963, the aerodynamic drag at the burnout altitude of 176,000 ft was only 252 lb, due to very low air density at that altitude. The empty weight of the X-15 was 14,590 lb. Using the equation of rate of climb l, which contains the assumption of steady unaccelerated flight, calculate the rate if climb of the X-15

1. During much of the powered phase of the maximum altitude flight, Joe Walker maintained the X-15 at a climb angle of 32 degrees l. When the rocket propellant ran out, the X-15 was climbing through 176,000 feet at a flight velocity of 5600 ft/s. Calculate the rate of climb at the time of engine burnout. 2. The thrust of the XLR99 rocket engine was essentially constant at 57,000 lb during the powered phase of the X-15 flight. For the maximum altitude flight on August 22,1963, the aerodynamic drag at the burnout altitude of 176,000 ft was only 252 lb, due to very low air density at that altitude. The empty weight of the X-15 was 14,590 lb. Using the equation of rate of climb l, which contains the assumption of steady unaccelerated flight, calculate the rate if climb of the X-15

The thrust of the XLR99 rocket engine was essentially constant at 57,000 lb during the powered phase of the X-15 flight. For the maximum altitude flight on August 22, 1963, the aerodynamic drag at the burnout altitude of 176,000 ft. was only 252 lb, due to the very low air density at that altitude. The empty weight of the X-15 was 14,590 lb. Using Equation of Rate of Climb, which contains the assumption of steady. unaccelerated flight, calculate the rate-of-climb of the X-15

Astronomers need to identify the position of objects in the sky with very high precision. For that, it is essential to have coordinate systems that specify the position of an object at a given time. One of them is the equatorial coordinate system that is widely used in astronomy. (a) Explain how the equatorial coordinate system works. (b) What is the meaning of J2000 that often occurs together with equatorial coordinates? The object NGC4440 is a galaxy located in the Virgo Cluster at the following equatorial coordinates (J2000): 12h 27m 53.6s (rightascension),12◦1703600 (declination). The Calar Alto Observatory is located in Spain at the geographical coordinates 37.23◦N and 2.55◦W. (c) Is the NGC4440 galaxy observable from the Calar Alto Observatory?