planet         planet type  semimajor axis ( au ) orbital period  radial velocity (m / s)                           detectable by :
0        51 pegasi b         hot jupiter                   0.05      4.23 days                   55.900           first - generation spectrograph
1        55 cancri d           gas giant                   5.77    14.29 years                   45.200           first - generation spectrograph
2            jupiter           gas giant                   5.20    11.86 years                   12.400           first - generation spectrograph
3        gliese 581c       super - earth                   0.07     12.92 days                    3.180          second - generation spectrograph
4             saturn           gas giant                   9.58    29.46 years                    2.750          second - generation spectrograph
5  alpha centauri bb  terrestrial planet                   0.04      3.23 days                    0.510          second - generation spectrograph
6            neptune           ice giant                  30.10   164.79 years                    0.281           third - generation spectrograph
7              earth    habitable planet                   1.00    365.26 days                    0.089  third - generation spectrograph (likely)

Table as JSON:
{"planet":{"0":"51 pegasi b","1":"55 cancri d","2":"jupiter","3":"gliese 581c","4":"saturn","5":"alpha centauri bb","6":"neptune","7":"earth"},"planet type":{"0":"hot jupiter","1":"gas giant","2":"gas giant","3":"super - earth","4":"gas giant","5":"terrestrial planet","6":"ice giant","7":"habitable planet"},"semimajor axis ( au )":{"0":0.05,"1":5.77,"2":5.2,"3":0.07,"4":9.58,"5":0.04,"6":30.1,"7":1.0},"orbital period":{"0":"4.23 days","1":"14.29 years","2":"11.86 years","3":"12.92 days","4":"29.46 years","5":"3.23 days","6":"164.79 years","7":"365.26 days"},"radial velocity (m \/ s)":{"0":55.9,"1":45.2,"2":12.4,"3":3.18,"4":2.75,"5":0.51,"6":0.281,"7":0.089},"detectable by :":{"0":"first - generation spectrograph","1":"first - generation spectrograph","2":"first - generation spectrograph","3":"second - generation spectrograph","4":"second - generation spectrograph","5":"second - generation spectrograph","6":"third - generation spectrograph","7":"third - generation spectrograph (likely)"}}