Calculate the angular diameter of a prestellar nebula of radius 125 AU lying 150 pc from Earth. angular diameter = 15. ΑΣΦ ? arc seconds
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Q: Calculate the mass of a star having a diameter of 6E5 km and an average density of 1.1 g/cm3
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Solved in 4 steps with 10 images
- If the mass of a star is 9.94 10^30 kg then what is Kepler's constant for that star?Reminder k = ( T^2 / R^3 )If an open cluster contains 650 stars and is 27 pc in diameter, what is the average distance between the stars? (Hint: On average, what share of the volume of the cluster surrounds each star?)If an open cluster contains 350 stars and is 48 pc in diameter, what is the average distance between the stars? On average what, share of the volume of the cluster surrounds each star?
- Can you please help with Part 2 of 2? Thank you.What is the escape velocity (in km/s) from the surface of 1.1 M neutron star? (hint: Use the formula for the escape velocity Ve = 2GM/R ; make sure to express quantities in United of meters, kilograms, and seconds. Assume a neutron has a radius of 11 km and assume the mass of the sun is 1.99 x10^30 kg.) 1.1 M neutron Star = _________ km/s 3.0 neutron Star = __________ km/sWhat is the radius event horizon for Cygnus-X1? a. 21 m b. 21 km c. 21 21 au d. 21 light years
- why do dark streaks appear in visible light images of the Trifid nebula, but appear bright in an infared imageif a protostellar disk is 260 au in radius and the disk plus the forming star together contain 7 solar masses what is the orbital speed at the outer edge of the disk in km per second. use the circular orbital velocity formula