What are the two major ways in which extrasolar planets have been discovered?
A) direct imaging with large telescopes
B) measuring changes in the star's brightness when a planet transits
C) measuring the motion of the star due to the planets' gravitational tugs
D) A and B
E) A and C
F) B and C
Question 2
What will happen in the Sun immediately after it has exhausted its supply of hydrogen in its core?
A) The core will collapse and a supernova will result.
B) The Sun will turn into a white dwarf and cool off forever.
C) The helium core will shrink, heat, and start fusing helium to carbon.
D) The helium core will shrink and heat; a shell of hydrogen will start fusing.
Planets, Earth and Moon
This chart shows the various lines of responsibility and how they differ in presidential and parliam
The Six Major Divisions of Biopsychology, with Examples of How They Have Approached the Study of ...
Direct immunoassays. A labeled antibody binds directly to the antigen. The label on the antibody can ...
Transcription and processing of the major ribosomal RNAs in eukaryotes
An educational institution has total direct labor and material costs of $1964 per student. Its ...