Space, Astronomy
Topic overview. Based on 33334 on-topic pages. [space-astronomy directory]
Significant concepts: 
photo credit, space exploration, international space development, national space development, kennedy space center, elon musk, cape canaveral, space telescope, space policy, national space society, space show, commercial space tourism, launch complex, deep space, united states.
Most relevant domains
Most relevant domains based on cumulative page relevance to the topic as defined by example links and on the number of relevant domains linking to them.
| domain | | | | | | | |
|---|---|---|---|---|---|---|---|
http://youtube.com/  | 1 | 390 | 401 | 7047 | 0.99 | 3.41 | youtube.com |
| http://space.com/ | 2 | 358 | 362 | 4145 | 1 | 3.37 | space.com |
| http://spacenews.com/ | 3 | 372 | 376 | 1079 | 0.98 | 2.6 | spacenews.com |
| http://nasa.gov/ | 4 | 221 | 246 | 10748 | 0.96 | 4.42 | nasa.gov |
| http://esa.int/ | 5 | 319 | 335 | 2373 | 0.99 | 2.8 | esa.int |
| http://universetoday.com/ | 6 | 312 | 316 | 4490 | 0.99 | 2.55 | universetoday.com |
| http://planetary.org/ | 7 | 328 | 330 | 1567 | 0.99 | 2.07 | planetary.org |
| http://hubblesite.org/ | 8 | 288 | 289 | 1741 | 0.99 | 2.28 | hubblesite.org |
| http://spaceref.com/ | 9 | 327 | 328 | 2805 | 1 | 1.99 | spaceref.com |
| http://popularmechanics.com/ | 10 | 370 | 382 | 1833 | 0.99 | 1.77 | popularmechanics.com |
Atext
Most frequent phrases in anchor texts of links found in this topical graph .
| atext | | | |
|---|---|---|---|
| sign in | 1248 | 76.31 | |
| permalink | 2718 | 62.1 | |
| nasa | 815 | 52.96 | |
| report | 856 | 51.49 | |
| share on twitter twitter | 800 | 48 | |
| view comments | 947 | 45.59 | |
| read more | 666 | 41.51 | |
| view | 776 | 41.1 | |
| news | 934 | 35.05 | |
| go to permalink | 469 | 31.97 |
Keyword ideas
Common word stems found in on-topic page titles.
| word | |
|---|---|
| space | |
| astronomi | |
| nasa | |
| scienc | |
| spacex | |
| launch | |
| mar | |
| news | |
| univers | |
| earth |
Popular pages
On-topic pages with highest topical PageRank.
Popular prospect pages
On-topic pages with highest topical PageRank having a few outgoing links and domains.
Hubs
Pages with most links towards other likely on-topic pages.
Domains with most linking domains
Relevant domains with most other relevant domains linking to them.
| domain | | | |
|---|---|---|---|
| http://youtube.com/ | 426 | 72.2 | youtube.com |
| http://nasa.gov/ | 414 | 486.92 | nasa.gov |
| http://facebook.com/ | 219 | 30.05 | facebook.com |
| http://wikipedia.org/ | 166 | 117.97 | wikipedia.org |
| http://space.com/ | 151 | 152.46 | space.com |
| http://esa.int/ | 105 | 31.75 | esa.int |
| http://harvard.edu/ | 102 | 61.5 | harvard.edu |
| http://amazon.com/ | 92 | 33.16 | amazon.com |
| http://wordpress.com/ | 86 | 11.93 | wordpress.com |
| http://instagram.com/ | 84 | 8.34 | instagram.com |