请详细介绍太阳系的八大行星按照距离太阳由近到远的顺序，并用XML格式列出每个行星的基本信息，包括名字、直径、质量、卫星数量
user
<solar_system>
    <planet>
        <name>Mercury</name>
        <diameter unit="km">4880</diameter>
        <mass unit="kg">3.3011e+23</mass>
        <satellites>0</satellites>
    </planet>
    <planet>
        <name>Venus</name>
        <diameter unit="km">12104</diameter>
        <mass unit="kg">4.8675e+24</mass>
        <satellites>0</satellites>
    </planet>
    <planet>
        <name>Earth</name>
        <diameter unit="km">12742</diameter>
        <mass unit="kg">5.9724e+24</mass>
        <satellites>1</satellites>
    </planet>
    <planet>
        <name>Mars</name>
        <diameter unit="km">6779</diameter>
        <mass unit="kg">6.4171e+23</mass>
        <satellites>2</satellites>
    </planet>
    <planet>
        <name>Jupiter</name>
        <diameter unit="km">139820</diameter>
        <mass unit="kg">1.8982e+27</mass>
        <satellites>79</satellites>
    </planet>
    <planet>
        <name>Saturn</name>
        <diameter unit="km">116460</diameter>
        <mass unit="kg">5.6834e+26</mass>
        <satellites>82</satellites>
    </planet>
    <planet>
        <name>Uranus</name>
        <diameter unit="km">50724</diameter>
        <mass unit="kg">8.6810e+25</mass>
        <satellites>27</satellites>
    </planet>
    <planet>
        <name>Neptune</name>
        <diameter unit="km">49244</diameter>
        <mass unit="kg">1.0243e+26</mass>
        <satellites>14</satellites>
    </planet>
</solar_system>
assistant