The densely packed neutrons of a neutron star cannot balance the inward pull of gravity if the total mass is
A) greater than Schwartzschild's limit of 3 solar masses.
B) less than 1.0 solar masses.
C) Chandrasekhar's limit of 1.4 solar masses.
D) not at least 25 solar masses.
E) between 1.4 and 2.0 solar masses.
Question 2
According to our present theory of solar system formation, which of the following statements about the growth of terrestrial and jovian planets is not true?
A) Both types of planet begun with planetesimals growing through the process of accretion, but only the jovian planets were able to capture hydrogen and helium gas from the solar nebula.
B) Swirling disks of gas, like the solar nebula in miniature, formed around the growing jovian planets but not around the growing terrestrial planets.
C) The jovian planets began from planetesimals made only of ice, while the terrestrial planets began from planetesimals made only of rock and metal.
D) The terrestrial planets formed inside the frost line of the solar nebula and the jovian planets formed beyond it.
The Sun is the nearest star to Earth.
Pulsars are highly magnetized, rotating neutron stars that emit a beam of electromagnetic radiation.
Radial and Transverse Velocities of a Star
A sod house in North Dakota, 1896. Individual “bricks” of sod were hewn from the ground and stacked
Percentage of Foreign-Born Whites and Native Whites of Foreign or Mixed Parentage in Total Populatio
Acid–Base Balance