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\begin{document}

\title{Authorea \textbar{}\textbar{} Bubble Nebula}


 \author{The Authorea Team}


\date{}

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The Hubble image of the Bubble Nebula (NGC 7635) is the official image
celebrating the 26th anniversary of Hubble's launch into Earth orbit's.
Since 1990 Hubble has been capturing awe-inspiring images of the
Universe.~Floating about 350 miles above the Earth, the Hubble Space
Telescope (HST) is able to take high-resolution images free of the
image-distortion that occurs due to atmospheric turbulence. Hubble
performs a full orbit around the Earth approximately every 95 minutes,
and since its launch has completed
\href{http://www.nasa-usa.de/mission_pages/hubble/story/index.html}{1.2
million observations}. Among its many accomplishments, HST helped
scientists determine the rate of expansion of the Universe.\\\selectlanguage{english}
\begin{figure}[h!]
\begin{center}
\includegraphics[width=1.00\columnwidth]{figures/bubblenebula/bubblenebula}
\caption{{\hypertarget{auto-label-caption-684438}{}
\emph{Bubble Nebula,~\textbf{NASA}}~%
}}
\end{center}
\end{figure}

The ~Bubble Nebula is a beautiful bubble of gas (mostly hydrogen) blown
by the stellar wind of a hot massive star that resides in its center.
This hot star is around 45 times the size of Earth's sun, and Its
incredibly hot gas escapes the star moving at over 4 million miles per
hour, offsetting the cold gas around it and forming the outer edge. The
nebula is located in the Cassiopeia constellation, at a distance of
7,100 light-years from Earth, and is 7 light-years in diameter, which is
150\% greater than the distance between our sun to Alpha Centauri.~\\\selectlanguage{english}
\begin{figure}[h!]
\begin{center}
\includegraphics[width=1.00\columnwidth]{figures/hubble/hubble}
\caption{{\hypertarget{auto-label-caption-772480}{}
The Hubble Space Telescope (which is 43.5 feet long and weights 24,500
pounds) as seen from the departing Space Shuttle~\emph{Atlantis,} HST
Servicing Mission 4. (Source: NASA) ~ ~ ~ ~%
}}
\end{center}
\end{figure}

Astronomers have published 14,000+ scientific papers using the Hubble's
over 120 terabytes worth of data. Authorea's collaborative writing and
data storage tools can boost your productivity too.
\href{https://www.authorea.com/start_writing_now?utm_source=intercom\&utm_medium=email\&utm_campaign=Onboarding\%20\%231\%20Thanks\%20for\%20signing\%20up}{Start
writing} your first document today.

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