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<p class="pageHeading">Astronomi</p>
<div class="section" id="measures-and-units">
<p class="sectionHeading">Mål og Enheder</p>
<p class="subHeading">Jf. <a href="/html/topic/physics.html">fysikkens mål og enheder</a>.</p>
<p>Mål med variante enheder:</p>
<table>
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<th>Mål</th>
<th>Enheder</th>
<th>Symboler<sub> af enheder</sub></th>
</tr>
<tr>
<td rowspan="2">masse</td>
<td>jupitermasse</td>
<td class="math">\(M_♃\)</td>
</tr>
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<td>solmasse</td>
<td class="math">\(M_☉\)</td>
</tr>
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<td rowspan="6">afstand</td>
<td>astronomisk enhed</td>
<td class="math">\(au\)</td>
</tr>
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<td>lyssekund</td>
<td class="math">\(ls\)</td>
</tr>
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<td>lysår</td>
<td class="math">\(ly\)</td>
</tr>
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<td>parsec</td>
<td class="math">\(pc\)</td>
</tr>
<tr>
<td>jupiterradius</td>
<td class="math">\(R_♃\)</td>
</tr>
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<td>solradius</td>
<td class="math">\(R_☉\)</td>
</tr>
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<td rowspan="2">tid</td>
<td>år</td>
<td class="math">\(a\)</td>
</tr>
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<td>dag</td>
<td class="math">\(d\)</td>
</tr>
</table>
<p class="math">\(1\ M_♃=189\ 813 \cdot 10^{22}\ kg\)</p>
<p class="math">\(1\ M_☉=19\ 8847 \cdot 10^{25}\ kg\)</p>
<br />
<p class="math">\(1\ au=149\ 597\ 870\ 7 \cdot 10^2\ m\)</p>
<p class="math">\(1\ ls=c \cdot 1\ s=299\ 792\ 458\ m\)</p>
<p class="math">\(1\ ly=c \cdot 315\ 576 \cdot 10^2\ s=94\ 607\ 304\ 725\ 808 \cdot 10^2\ m\)</p>
<p class="math">\(1\ pc=1\ au \cdot cot(1^{\prime \prime})=30\ 856\ 775\ 814\ 671\ 916\ m\)</p>
<p class="math">\(1\ R_♃=71492 \cdot 10^{3}\ m\)</p>
<p class="math">\(1\ R_☉=6957 \cdot 10^{5}\ m\)</p>
<br />
<p class="math">\(1\ a=\frac {1461}{4}\ d=315576 \cdot 10^2\ s\)</p>
<p class="math">\(1\ d=864 \cdot 10^2\ s\)</p>
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