How do astronomers know that the luminous regions of active nuclei of active galaxies are very small?
a. Their nuclei are much brighter than expected.
b. The orbits of stars near the center of the galactic nuclei are faster than expected.
c. The luminosity of the nuclei varies over short times.
d. The color of the nuclei is different than expected.
Question 2
Synchrotron radiation is produced
a. in planetary nebulae.
b. by red dwarfs.
c. in massive stars as their iron core collapses.
d. in supernova.
e. by neutrinos.
Comet Nuclei
Regions of the Primary Motor Cortex and Associated Axons of the Corpus Callosum
Electrical charge of the inner and outer regions of nerve cells
Vertebral regions showing the four spinal curves.
To satisfy the inequality, sketch the following function by hand and shade the graph regions.
Polar distribution of auxin is driven by asymmetrical positioning of plasma membrane active transpor