<p><strong>Deep space</strong> could be simply defined, as a part of the universe, which is lying beyond the Earth-Moon system. However, when speaking about <strong>deep space objects</strong> we generally mean stars, star clusters and nebulae, which are outside the Solar System.</p>

CC BY-SA 3.0
2016-04-02T06:24:45.417Z
2016-04-02T06:24:45.417Z
Violette
<p>It's not in any sort of academic context, but in relation to space exploration <a href="http://www.nasa.gov/exploration/systems" rel="nofollow">NASA</a> defines deep space as such:</p>

<blockquote>
  <p>Deep space is the vast region of space that extends beyond our Moon, to Mars and across our solar system.</p>
</blockquote>

<p>Again, not exactly an academic context, but <a href="http://rads.stackoverflow.com/amzn/click/1579129781" rel="nofollow">Govert Schiling</a> (the author of <em>Deep Space: Beyond the Solar System to the End of the Universe and the Beginning of Time</em>) in relation to astronomy defines deep space differently:</p>

<blockquote>
  <p>In a sense, everything beyond Earth’s atmosphere is deep space. But more typically it’s a phrase that has been used by observational and amateur astronomers alike for extended objects beyond the Solar System. I decided to provide a brief introductory section on the Sun and the planets, but the emphasis is really on the objects in our Galaxy and the wider Universe.</p>
</blockquote>

<p>So this more or less echoes what some others have contributed, but provides additional context.</p>

CC BY-SA 3.0
2016-04-03T04:06:22.543Z
2016-04-03T04:06:22.543Z
called2voyage
<p>I need to know the definition of deep space.  I am an amateur astronomer, and am experiencing some difficulty understanding this.</p>

CC BY-SA 3.0
2016-04-02T17:54:01.627Z
You may get better answers if you describe, in reasonable detail, what difficulty you have in understanding.
James K
<distances>
What is the definition of "deep space"?
rocknrook
# What is the definition of "deep space"?

(Asked by: username_0 on 2016-04-02)

I need to know the definition of deep space. I am an amateur astronomer, and am experiencing some difficulty understanding this.

**Tags:** distances

> **Comments:**
> **username_1**: You may get better answers if you describe, in reasonable detail, what difficulty you have in understanding.  

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## 2 answers

### Answer by username_2 on 2016-04-02. Score: 3

**Deep space** could be simply defined, as a part of the universe, which is lying beyond the Earth-Moon system. However, when speaking about **deep space objects** we generally mean stars, star clusters and nebulae, which are outside the Solar System.


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### Answer by username_3 on 2016-04-03. Score: 1

It's not in any sort of academic context, but in relation to space exploration [NASA](http://www.nasa.gov/exploration/systems) defines deep space as such:

> Deep space is the vast region of space that extends beyond our Moon, to Mars and across our solar system.

Again, not exactly an academic context, but [Govert Schiling](http://rads.stackoverflow.com/amzn/click/1579129781) (the author of *Deep Space: Beyond the Solar System to the End of the Universe and the Beginning of Time*) in relation to astronomy defines deep space differently:

> In a sense, everything beyond Earth’s atmosphere is deep space. But more typically it’s a phrase that has been used by observational and amateur astronomers alike for extended objects beyond the Solar System. I decided to provide a brief introductory section on the Sun and the planets, but the emphasis is really on the objects in our Galaxy and the wider Universe.

So this more or less echoes what some others have contributed, but provides additional context.


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