Movie Playtime 4 Hours in Battery Mode. App Store Supported. OTA Supported. OS Android 7. Bluetooth 4. Wi-Fi Speaker 5W. GPU Adreno Focus Adjustment Manual. Throw Distance 0. Throw Ratio 1. Aspect Ratio Lamp Life 30, Hours. Brightness ANSI lumens. Native Resolution x A nebula Latin for 'cloud' or 'fog';  pl. Originally, the term was used to describe any diffused astronomical object , including galaxies beyond the Milky Way. The Andromeda Galaxy , for instance, was once referred to as the Andromeda Nebula and spiral galaxies in general as "spiral nebulae" before the true nature of galaxies was confirmed in the early 20th century by Vesto Slipher , Edwin Hubble and others.
Most nebulae are of vast size; some are hundreds of light-years in diameter. A nebula that is visible to the human eye from Earth would appear larger, but no brighter, from close by.
Many nebulae are visible due to fluorescence caused by embedded hot stars, while others are so diffused that they can be detected only with long exposures and special filters.
Some nebulae are variably illuminated by T Tauri variable stars. Nebulae are often star-forming regions, such as in the " Pillars of Creation " in the Eagle Nebula. In these regions, the formations of gas, dust, and other materials "clump" together to form denser regions, which attract further matter, and eventually will become dense enough to form stars.
The remaining material is then believed to form planets and other planetary system objects. He also noted a region of nebulosity between the constellations Ursa Major and Leo that was not associated with any star. This nebula was also observed by Johann Baptist Cysat in However, the first detailed study of the Orion Nebula was not performed until , by Christiaan Huygens , who also believed he was the first person to discover this nebulosity.
In , Edmond Halley published a list of six nebulae. From to , Nicolas-Louis de Lacaille cataloged 42 nebulae from the Cape of Good Hope , most of which were previously unknown. Charles Messier then compiled a catalog of "nebulae" now called Messier objects , which included what are now known to be galaxies by ; his interest was detecting comets , and these were objects that might be mistaken for them. The number of nebulae was then greatly increased by the efforts of William Herschel and his sister Caroline Herschel.
A second catalog of a thousand was published in and the third and final catalog of appeared in During much of their work, William Herschel believed that these nebulae were merely unresolved clusters of stars.
In , however, he discovered a star surrounded by nebulosity and concluded that this was a true nebulosity, rather than a more distant cluster. Beginning in , William Huggins examined the spectra of about 70 nebulae. He found that roughly a third of them had the emission spectrum of a gas. The rest showed a continuous spectrum and thus were thought to consist of a mass of stars. Thus the nebula radiates by reflected star light.
About , following the Great Debate , it had become clear that many "nebulae" were in fact galaxies far from our own. Slipher and Edwin Hubble continued to collect the spectra from many different nebulae, finding 29 that showed emission spectra and 33 that had the continuous spectra of star light.
He also discovered that the emission spectrum nebulae are nearly always associated with stars having spectral classifications of B or hotter including all O-type main sequence stars , while nebulae with continuous spectra appear with cooler stars. There are a variety of formation mechanisms for the different types of nebulae. The Nebula -class was composed of two hull sections; the saucer-shaped primary hull mounted atop the secondary hull , with two warp nacelles mounted on either side of the secondary hull, directly below the primary hull.
Atop the primary hull was a superstructure which could support a variety of modules, such as the inclusion of a triangular platform, fitted with torpedo launchers , an oval platform, or additional warp nacelles.
By , the Nebula -class was reconfigured slightly to include more of a Galaxy -class style secondary hull and deflector dish.
By , the Nebula -class served among historic model designs used in the classroom aboard Deep Space 9. DS9 : " The Nagus ". The Nebula -class was equipped with "a huge arsenal", at least according to Cardassian Gul Macet , which included multiple phaser banks and torpedo launchers.
The Nebula -class had a maximum effective weapons range slightly below , kilometers. TNG : " The Wounded ". The typical offensive arsenal of the Nebula -class included a torpedo launcher located on the secondary hull above the deflector dish , and on some variants, a torpedo launcher located on the superstructure located above the primary hull. While considered more than a match for a Cardassian supply ship , the Nebula -class was also capable of successfully withstanding a direct hit from a Cardassian warship , as a result of an unshielded attack.
TNG : " The Wounded " They were, however, unable to single-handedly withstand an assault from a wing of Cardassian destroyers. DS9 : " Waltz ". Some Nebula -class starships, including the Phoenix , used a "high-energy sensor sweep" that cycled every 5. Between each of those cycles, a "window" of a fiftieth of a second would open, requiring the ship's shields to be realigned.
The propulsion systems for the Nebula -class were constructed under the authority of Yoyodyne Propulsion Systems. The closest known nebula to Earth is called the Helix Nebula. It is the remnant of a dying star—possibly one like the Sun. It is approximately light-years away from Earth. That means even if you could travel at the speed of light, it would still take you years to get there!
This image might look like a creepy eyeball, but it's actually a nebula! Astronomers use very powerful telescopes to take pictures of faraway nebulae.This album came about thanks to the amazing and amazingly inspiring virtual instruments created by Elektrostudio (Poland). It was, in fact, entirely recorded using solely the VST plug-in pack that its absolutely brilliant and generous developer - Robert - made available for free.