A researcher proposes that the universe is filled with a mysterious, extra-dark matter that makes up the majority of its mass and causes galaxies to move farther apart in a non specific way. The substance cannot be directly observed or measured, but the researcher argues that it must exist based on the observed motion of galaxies.  This is a(n)....*1 pointunTestability hypothesishypothesis rejected by Occam's razor.Valid hypothesis

A team of researchers proposes that the Big Bang theory is incorrect, and the universe has always existed in its current form. They argue that the observed cosmic microwave background radiation can be explained by other means, such as dust or gas in the interstellar medium doing a series of reactions due to light in a specific way. This is a(n)...*1 pointunTestability hypothesisunfalsifiable Hypothesishypothesis rejected by Occam's razor.valid hypothesis

A scientific theoryGroup of answer choicesis a scientific fact integrates many validated hypothesesbecomes a physical law if it is proven beyond reasonable doubt

Philosophers of science sometimes call the idea that there is nothing special about our place in the universe the?Group of answer choicesNewtonian PrincipleCopernican PrincipleTheory of RelativityHubble's Law

Dark matter is hypothesized to make up about 27% of the universe's mass-energy content but does not emit, absorb, or reflect electromagnetic radiation, making it invisible and detectable only through its gravitational effects. Despite extensive efforts, scientists have yet to directly observe dark matter particles or fully understand their properties.Similarly, dark energy is believed to be responsible for the observed accelerated expansion of the universe. It comprises approximately 68% of the universe's mass-energy content and is characterized by negative pressure, causing the expansion of the universe to accelerate over time. However, the nature and origin of dark energy remain elusive, posing a significant challenge to physicists.Understanding the true nature of dark matter and dark energy is crucial for developing a complete and accurate model of the universe's structure and evolution. Researchers are actively working on various experimental and theoretical approaches to unravel these mysteries, but they remain among the most compelling and unsolved questions in modern physics.

The amount of total mass in the universe is vastly greater than the total mass we can actually account for due to this mysterious substance - yet to be formally proven into existence - that emits no light and accounts for approximately 95% of the mass in the universe. *CadmiumAntimonyEtherDark Matter