Sometime in the Future, a Crewed Space Mission to Saturn

question 235

Multiple Choice

Sometime in the future, a crewed space mission to Saturn might place an observer in a spacecraft within Saturn's ring system. What relationship between the motions of the ring particles and the motion of the spacecraft would the observer see?

• A) All particles would be moving with the same orbital speed and would fly in formation with the spacecraft because the motions of particles and spacecraft are governed by gravity.
• B) Particles closer to the planet would overtake the spacecraft, while particles farther from the planet would be overtaken by the spacecraft, following Kepler's laws.
• C) The particles would be moving in ellipses and would therefore sometimes move ahead of the spacecraft and at other times fall behind the spacecraft, even colliding with it occasionally.
• D) Particles orbiting farther from the planet would be traveling faster and would overtake the spacecraft, while particles closer to the planet would be moving slower and would be overtaken by the spacecraft.

---

Definitions:

Dizygotic

Refers to twins that are developed from two separate fertilized eggs, also known as fraternal twins, resulting in siblings that are genetically similar but not identical.

Sex-linked Recessive Disorders

Genetic disorders that are carried on the sex chromosomes, typically the X chromosome, and are expressed in the phenotype only when a dominant allele is not present.

Down Syndrome

A genetic disorder caused by the presence of an extra chromosome 21, characterized by physical growth delays, characteristic facial features, and mild to moderate intellectual disability.

Down Syndrome

A genetic disorder caused by the presence of all or part of a third copy of chromosome 21, characterized by distinct physical features and intellectual disability.