![](/peth04/20041020095249im_/http://www1.nasa.gov/templateimages/common/spacer.gif) | ![NASA FACT?](/peth04/20041020095249im_/http://www1.nasa.gov/templateimages/navigation/leftnav/nasa_fact_red.gif) | ![](/peth04/20041020095249im_/http://www1.nasa.gov/templateimages/common/spacer.gif) | ![](/peth04/20041020095249im_/http://www1.nasa.gov/templateimages/common/spacer.gif) | ![](/peth04/20041020095249im_/http://www1.nasa.gov/templateimages/common/spacer.gif) The three objects in the solar system known to have nitrogen-dominated atmospheres are Earth, Saturn's moon Titan, and Neptune's moon Triton.
![](/peth04/20041020095249im_/http://www1.nasa.gov/templateimages/common/spacer.gif)
| ![](/peth04/20041020095249im_/http://www1.nasa.gov/templateimages/common/spacer.gif) | ![](/peth04/20041020095249im_/http://www1.nasa.gov/templateimages/common/spacer.gif) |
+ More NASA Facts...
|
| ![](/peth04/20041020095249im_/http://www1.nasa.gov/templateimages/common/spacer.gif) |
|
![FEATURES FEATURES](/peth04/20041020095249im_/http://www1.nasa.gov/templateimages/title/title_features_red.gif) |
| ![](/peth04/20041020095249im_/http://www1.nasa.gov/images/common/spacer.gif) |
| ![](/peth04/20041020095249im_/http://www1.nasa.gov/images/common/spacer.gif) |
|
| When Galaxies Collide
What might happen if two galaxies collide?
+ Read More
![](/peth04/20041020095249im_/http://www1.nasa.gov/images/common/spacer.gif) | |
![](/peth04/20041020095249im_/http://www1.nasa.gov/images/common/spacer.gif) |
|
| Meet NASA's Future Explorer - Jose Hernandez
Listen as NASA talks with a 2004 Astronaut Candidate.
+ Read More
![](/peth04/20041020095249im_/http://www1.nasa.gov/images/common/spacer.gif) | |
![](/peth04/20041020095249im_/http://www1.nasa.gov/images/common/spacer.gif) |
|
| The Path That Nearly Wasn't Followed
After conquering seasickness, Carlos Del Castillo receives award for exploring the oceans.
+ Read More
![](/peth04/20041020095249im_/http://www1.nasa.gov/images/common/spacer.gif) | |
![](/peth04/20041020095249im_/http://www1.nasa.gov/images/common/spacer.gif) |
|
| NASA Explorer Institutes
NASA Explorer Institutes (NEI) has announced a new Cooperative Agreement Notice.
+ Read More
![](/peth04/20041020095249im_/http://www1.nasa.gov/images/common/spacer.gif) | |
![](/peth04/20041020095249im_/http://www1.nasa.gov/images/common/spacer.gif) |
|
| Meet NASA's Future Explorer - Chris Cassidy
Listen as NASA talks with a 2004 Astronaut Candidate.
+ Read More
![](/peth04/20041020095249im_/http://www1.nasa.gov/images/common/spacer.gif) | |
![](/peth04/20041020095249im_/http://www1.nasa.gov/images/common/spacer.gif) |
| + View Archive | |
|
![EDUCATIONAL NEWS EDUCATIONAL NEWS](/peth04/20041020095249im_/http://www1.nasa.gov/templateimages/title/title_educational_news_red.gif) |
| ![](/peth04/20041020095249im_/http://www1.nasa.gov/images/common/spacer.gif) |
| ![](/peth04/20041020095249im_/http://www1.nasa.gov/images/common/spacer.gif) |
| 10.13.04 - Next Chapter in Exploration & History Series
Continuing the NASA online history series "Why We Explore," the second installment will be posted to the NASA Web Portal on Friday.
+ Read More | |
![](/peth04/20041020095249im_/http://www1.nasa.gov/images/common/spacer.gif) |
| 10.13.04 - Free Programs Will Preview Mars Mission
Two free public programs in Pasadena this week will introduce NASA's next Mars mission.
+ Read More | |
![](/peth04/20041020095249im_/http://www1.nasa.gov/images/common/spacer.gif) |
| 10.08.04 - New Astronauts Meet The Press
NASA's astronaut candidates are available to meet with the news media Thursday in Houston at 3 p.m. EDT.
+ Read More | |
![](/peth04/20041020095249im_/http://www1.nasa.gov/images/common/spacer.gif) |
| 10.07.04 - Officer Inspires Next Generation of Explorers
Alicia Beam is an education officer for K-12 programs in the Academic Affairs Department at Marshall Space Flight Center, Huntsville.
+ Read More | |
![](/peth04/20041020095249im_/http://www1.nasa.gov/images/common/spacer.gif) |
| 10.01.04 - Station Crew Gets Final Call
Students and educators will have the final classroom chat with the crew of the International Space Station Tuesday at 11:25 a.m. EDT.
+ Read More | |
![](/peth04/20041020095249im_/http://www1.nasa.gov/images/common/spacer.gif) |
| + View Archive | |
| ![](/peth04/20041020095249im_/http://www1.nasa.gov/templateimages/common/spacer.gif) |
|
![RELATED NASA SITES RELATED NASA SITES](/peth04/20041020095249im_/http://www1.nasa.gov/templateimages/title/title_related_nasa_sites_red.gif) | |
![](/peth04/20041020095249im_/http://www1.nasa.gov/images/common/spacer.gif) | |
![](/peth04/20041020095249im_/http://www1.nasa.gov/images/common/spacer.gif) | |
| Space Weather Resources
Check out these links on sunspotters, radio waves, magnetosphere, and auroral friends.
+ View site | |
![](/peth04/20041020095249im_/http://www1.nasa.gov/images/common/spacer.gif) |
| Tracking a Solar Storm
Check out this Web site full of resources on solar storms.
+ View site | |
![](/peth04/20041020095249im_/http://www1.nasa.gov/images/common/spacer.gif) |
| Future Mission Concepts
Find out what ideas NASA is looking at for future missions into our universe.
+ View site | |
![](/peth04/20041020095249im_/http://www1.nasa.gov/images/common/spacer.gif) |
| Infrared Astronomy
This site has a wealth of information regarding infrared astronomy.
+ View site | |
![](/peth04/20041020095249im_/http://www1.nasa.gov/images/common/spacer.gif) |
| + View Archive | |
|
|