Space, Astronomy
Topic overview. Based on 33334 on-topic pages. [space-astronomy directory]
Significant concepts: 
all about space, canaveral air force station, space program, subscribe to americaspace, space industry, one comment, space show, like this load, international space development, space shuttle, space exploration, deep space, space telescope, air force, low earth orbit.
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 |