 planet</td>
                                    </tr>
                                    <tr>
                                        <th rowspan="4" scope="rowgroup">Jovian planets</th>
                                        <th rowspan="2" scope="rowgroup">Gas giants</th>
                                        <th scope="row">Jupiter</th>
                                        <td>1898</td>
                                        <td>142,984</td>
                                        <td>1326</td>
