Consider the image. The stars in the Antlia dwarf galaxy are all the same distance from Earth.If one star has an intrinsic luminosity of 4.4 Lsun and a second star has an intrinsic luminosity of 2.0 Lsun, which star appears brighter in the night sky?
Based on their colors, which of the following stars is hotte…
Based on their colors, which of the following stars is hottest?
Each second the Sun’s mass
Each second the Sun’s mass
Which type of spectrum would you expect to see from a star?
Which type of spectrum would you expect to see from a star?
What is/are the method(s) for determining the radius of a st…
What is/are the method(s) for determining the radius of a star?
How do astronomers determine the luminosity class of stars f…
How do astronomers determine the luminosity class of stars from their spectra?
If a star is circumpolar from a given location that means th…
If a star is circumpolar from a given location that means that the star is above the horizon all night but not during the day.
What is the best current method for determining the luminosi…
What is the best current method for determining the luminosity of a nearby star?
If you give a cart with a mass of 3.0 kg a push with a force…
If you give a cart with a mass of 3.0 kg a push with a force of 69 Newtons, what is the cart’s acceleration?
Match the planets to their pictures. [Image 1] [Image 2…
Match the planets to their pictures.