| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| download free online astronomy course caltech | 2 | 0.2 | 1981 | 71 |
| caltech graduate programs in astronomy | 0.45 | 0.9 | 6386 | 69 |
| free college astronomy course online | 1.71 | 0.8 | 5768 | 67 |
| astronomy free online course | 1.21 | 0.7 | 5681 | 3 |
| free online courses on astronomy | 1.6 | 1 | 5554 | 52 |
| online astronomy college course | 0.57 | 1 | 1327 | 59 |
| online course on astronomy | 0.77 | 0.8 | 293 | 89 |
| astronomy online course with certificate | 0.99 | 1 | 7582 | 21 |
| free online classes for astronomy | 0.06 | 0.5 | 8357 | 77 |
| free online courses basic astronomy | 0.1 | 0.7 | 9502 | 83 |
| online courses for astronomy | 1.63 | 0.9 | 8594 | 90 |
| astronomy online courses with certificate | 1.23 | 0.8 | 5162 | 93 |
| free astronomy courses with certificate | 0.7 | 0.4 | 7148 | 55 |
| free courses on astronomy | 1.18 | 0.5 | 5747 | 42 |
