gistfile1.txt

$ scrapy shell "http://ssd.jpl.nasa.gov/?planet_phys_par"
...
In [1]: data = []

In [2]: for row in response.xpath('//table[count(./tr) > 3 and count(./tr[1]/td) > 3]/tr'):
    data.append([' '.join(filter(None, map(unicode.strip, td.css('::text').extract()))) for td in row.xpath('td')])
   ...:

In [3]: pd.DataFrame(data)

         0                   1                   2                        3   \
0    Planet   Equatorial Radius         Mean Radius                     Mass
1                          (km)                (km)             (x 10 24 kg)
2   Mercury   2439.7 ±1.0 [ D ]   2439.7 ±1.0 [ D ]  0.330104 ±.000036 [ F ]
3     Venus   6051.8 ±1.0 [ D ]   6051.8 ±1.0 [ D ]    4.86732 ±.00049 [ G ]
4     Earth  6378.14 ±.01 [ D ]  6371.00 ±.01 [ D ]    5.97219 ±.00060 [ H ]
5      Mars   3396.19 ±.1 [ D ]   3389.50 ±.2 [ D ]  0.641693 ±.000064 [ I ]
6   Jupiter      71492 ±4 [ D ]      69911 ±6 [ D ]       1898.13 ±.19 [ J ]
7    Saturn      60268 ±4 [ D ]      58232 ±6 [ D ]      568.319 ±.057 [ K ]
8    Uranus      25559 ±4 [ D ]      25362 ±7 [ D ]     86.8103 ±.0087 [ L ]
9   Neptune     24764 ±15 [ D ]     24622 ±19 [ D ]      102.410 ±.010 [ M ]
10    Pluto       1151 ±6 [ C ]       1151 ±6 [ C ]     .01309 ±.00018 [ N ]

                     4                         5                      6   \
0          Bulk Density  Sidereal Rotation Period  Sidereal Orbit Period
1            (g cm -3 )                       (d)                    (y)
2     5.427 ±.007 [ * ]             58.6462 [ D ]        0.2408467 [ B ]
3     5.243 ±.003 [ * ]            -243.018 [ D ]       0.61519726 [ B ]
4   5.5134 ±.0006 [ * ]          0.99726968 [ B ]        1.0000174 [ B ]
5   3.9340 ±.0008 [ * ]          1.02595676 [ D ]        1.8808476 [ B ]
6   1.3262 ±.0004 [ * ]             0.41354 [ D ]        11.862615 [ B ]
7   0.6871 ±.0002 [ * ]             0.44401 [ D ]        29.447498 [ B ]
8     1.270 ±.001 [ * ]            -0.71833 [ D ]        84.016846 [ B ]
9     1.638 ±.004 [ * ]             0.67125 [ D ]        164.79132 [ B ]
10      2.05 ±.04 [ * ]             -6.3872 [ D ]        247.92065 [ B ]

                   7                 8                   9                10
0              V(1,0)  Geometric Albedo  Equatorial Gravity  Escape Velocity
1               (mag)                             (m s -2 )       (km s -1 )
2   -0.60 ±0.10 [ E ]       0.106 [ B ]          3.70 [ * ]       4.25 [ * ]
3   -4.47 ±0.07 [ E ]        0.65 [ B ]          8.87 [ * ]      10.36 [ * ]
4         -3.86 [ B ]       0.367 [ B ]          9.80 [ * ]      11.19 [ * ]
5         -1.52 [ B ]       0.150 [ B ]          3.71 [ * ]       5.03 [ * ]
6         -9.40 [ B ]        0.52 [ B ]         24.79 [ * ]      60.20 [ * ]
7         -8.88 [ B ]        0.47 [ B ]         10.44 [ * ]      36.09 [ * ]
8         -7.19 [ B ]        0.51 [ B ]          8.87 [ * ]      21.38 [ * ]
9         -6.87 [ B ]        0.41 [ B ]         11.15 [ * ]      23.56 [ * ]
10         -1.0 [ B ]         0.3 [ B ]          0.66 [ * ]       1.23 [ * ]