## How much dark energy does the universe have?

They find a Universe that’s 70% dark energy and 30% total matter (normal matter and dark matter combined), with an uncertainty of only ~1% on both figures. But the biggest surprising result comes from the attempt to measure the expansion rate of the Universe.

astronomy spec

## What is astronomical spectroscopy?

Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, ultraviolet, X-ray, infrared and radio waves that radiate from stars and other celestial objects.

## What skills do students need to be able to observe astronomy?

Students should: Maths skills 11.13 Understand the main theories for the origin of water on Earth 11.14 Know that the human eye is limited in astronomical observations by its small aperture and limited sensitivity in low light

## What does the spectrum of a star look like?

The spectrum below is an intensity plot of a star. Note the characteristic absorption line features including strong lines for Hα, Hβ, Hγ and Hδ – the Balmer Series. The overall shape of the spectrum approximates a black body curve with a peak wavelength. This can be used to determine the effective temperature of the star.

## What is the importance of spectral classes in astronomy?

The concept of spectral classes is discussed in more detail on the next page. Careful analysis of a star’s spectrum provides astronomers with a wealth of detail including its effective temperature, rotational velocity, translational velocity, its density and its chemical composition and metallicity. These are all discussed on another page.

space 3d models

## Where can I find free space 3D models?

Free Space 3D models. 10,840 space 3D models are available for download on CGTrader. Space is a category full of low poly, game-ready models of sci-fi spaceships. There are also asteroids, planets (including Moon and Mars, to simulate colonization) and realistic space shuttles for the more scientifically inclined.

## Are there any 3D space models on CGTrader?

Space 3D models. 15,536 space 3D models are available for download on CGTrader. Space is a category full of low poly, game-ready models of sci-fi spaceships. There are also asteroids, planets (including Moon and Mars, to simulate colonization) and realistic space shuttles for the more scientifically inclined.

## Are there any 3D models of the Moon?

A 3D model of Earth’s Moon. A 3D model of Hyperion, a moon of Saturn. A 3D model of 2014 MU69, the most distant object ever explored up close. A 3D model of asteroid Itokawa. A 3D model of NASA’s Cassini spacecraft, which orbited Saturn from 2004 to 2017.

models of the universe definition

## What are the models of the universe?

Another model of the universe is known as the open universe. This is a model of an infinite universe involving curved space-time, which does not curve back on itself. It is said to have negative curvature. As seen below, it looks like a saddle of sorts:

## What did the Standard Model predict about the universe?

The Standard Model predicted the existence of the recently discovered Higgs boson, a particle that is a manifestation of a field within the universe that can endow particles with mass. Because of its success in explaining a wide variety of experimental results, the Standard Model is sometimes regarded as a "theory of almost everything".