Examlex
What is a planetary nebula, and why are many planetary nebulae not symmetrical?
Autism
A developmental disorder characterized by difficulties with social interaction and communication, and by restricted and repetitive behavior.
Cystic Fibrosis
A genetic disorder affecting the lungs and digestive system, characterized by thick, sticky mucus that can lead to severe respiratory and gastrointestinal issues.
Inherited
Acquired from a predecessor, such as traits, money, or property, passed down through familial lines.
Degenerative Brain Disorder
A condition that results in the gradual deterioration of brain function, affecting memory, thinking, language, and judgement.
Q7: Redshift z = v<sub>r</sub>/c, where v<sub>r</sub>
Q21: The lowest-density gas in the interstellar medium
Q21: Along the main sequence, how do the
Q24: What is one way in which high-mass
Q36: In the figure below, three identical photons
Q50: Why is 21-cm radiation one of the
Q61: Using the formula g =GM<sub>NS</sub>/R<sup>2</sup><sub>NS</sub>, calculate the
Q74: Why are neutrino detectors located deep underground?
Q87: The oldest photons we detect in the
Q95: Explain what four-dimensional spacetime means.