Search

NASA+

Search

Suggested Searches

Climate Change
Artemis
Expedition 64
Mars perseverance
SpaceX Crew-2
International Space Station
View All Topics A-Z

Home
Missions
Humans in Space
Earth
The Solar System
The Universe
Science
Aeronautics
Technology
Learning Resources
About NASA
Español

News & Events
Multimedia
NASA+

Featured

NASA-Funded Research Finds Complex Life Defying Record Heat

NASA-Funded Research Finds Complex Life Defying Record Heat

article14 hours ago

A panoramic view of a barren, reddish-orange Martian landscape stretching toward distant hills, partially obscured by the jagged black silhouettes of a rover in the foreground.

NASA Discovery Reveals Complex Water Systems on Early Mars

article2 days ago

NASA’s Moon Orbiter Spots New, ‘Once-in-Century’ Moon Crater

NASA’s Moon Orbiter Spots New, ‘Once-in-Century’ Moon Crater

article7 days ago

Missions

Search All NASA Missions
A to Z List of Missions
Upcoming Launches and Landings
Spaceships and Rockets
Communicating with Missions
Artemis
James Webb Space Telescope
Hubble Space Telescope
International Space Station
OSIRIS-Rex

Humans in Space

Why Go to Space
Astronauts
Commercial Space
Destinations
Spaceships and Rockets
Living in Space

Earth

Explore Earth Science
Climate Change
Earth, Our Planet
Earth Science in Action
Earth Multimedia
Earth Data
Earth Science Researchers

The Solar System

The Sun
Mercury
Venus
Earth
The Moon
Mars
Jupiter
Saturn
Uranus
Neptune
Pluto & Dwarf Planets
Asteroids, Comets & Meteors
The Kuiper Belt
The Oort Cloud
Skywatching

The Universe

Exoplanets
The Search for Life in the Universe
Stars
Galaxies
Black Holes
The Big Bang
Dark Energy
Dark Matter

Science

Earth Science
Planetary Science
Astrophysics & Space Science
The Sun & Heliophysics
Biological & Physical Sciences
Lunar Science
Citizen Science
Astromaterials
Aeronautics Research
Human Space Travel Research

Aeronautics

Science in the Air
NASA Aircraft
Flight Research Innovation
Supersonic Flight
Air Traffic Solutions
Green Aviation Tech
Drones & You

Technology

Technology Transfer & Spinoffs
Space Travel
Living in Space
Lunar Surface Technology
Manufacturing and Materials
Robotics
Science Instruments
Computing

Learning Resources

For Kids and Students
For Educators
For Colleges and Universities
For Professionals
Science for Everyone
Requests for Exhibits, Artifacts, Speakers & Flyovers
STEM Engagement at NASA

About NASA

NASA's Impacts
Centers and Facilities
Directorates
Organizations
People of NASA
Careers
Internships
Our History
Doing Business with NASA
Get Involved
Contact

NASA en Español

Ciencia
Aeronáutica
Ciencias Terrestres
Sistema Solar
Universo

News & Events

News Releases
Recently Published
Video Series on NASA+
Podcasts & Audio
Blogs
Newsletters
Social Media
Media Resources
Events
Upcoming Launches & Landings
Virtual Guest Program

Multimedia

NASA+
Images
NASA Live
NASA Apps
Podcasts
Image of the Day
e-Books
3D Resources
Interactives
STEM Multimedia
NASA Brand & Usage Guidelines

Featured

NASA’s Hubble Spots an Out-of-Sync Galaxy

NASA’s Hubble Spots an Out-of-Sync Galaxy

article 5 days ago

NASA-JAXA XRISM Mission Sees Pulsar Gathering Companion’s ‘Wind’

NASA-JAXA XRISM Mission Sees Pulsar Gathering Companion’s ‘Wind’

article 5 days ago

NASA’s Moon Orbiter Spots New, ‘Once-in-Century’ Moon Crater

NASA’s Moon Orbiter Spots New, ‘Once-in-Century’ Moon Crater

article 7 days ago

Highlights

Risks of Decompression Sickness and Venous Thromboembolism during Spaceflight and Patent Foramen Ovale Implications

Risks of Decompression Sickness and Venous Thromboembolism during Spaceflight and Patent Foramen Ovale Implications

article 12 hours ago

NASA Astronaut to Answer Questions from New Hampshire Students

NASA Astronaut to Answer Questions from New Hampshire Students

article 18 hours ago

NASA’s Integrated Medical Model (IMM)

NASA’s Integrated Medical Model (IMM)

article 7 days ago

Highlights

Boom Year for Desert Blooms

Boom Year for Desert Blooms

article 4 hours ago

NASA-Funded Research Finds Complex Life Defying Record Heat

NASA-Funded Research Finds Complex Life Defying Record Heat

article 14 hours ago

Amendment 75: Corrections to several program elements regarding SciENcv and other topics

Amendment 75: Corrections to several program elements regarding SciENcv and other topics

article 15 hours ago

Highlights

Embracing the Equinox

Embracing the Equinox

article 1 day ago

NASA Discovery Reveals Complex Water Systems on Early Mars

NASA Discovery Reveals Complex Water Systems on Early Mars

article 2 days ago

Helio and You: A Fresh Perspective on the Sun

Helio and You: A Fresh Perspective on the Sun

article 6 days ago

Featured

Overlap Zoo

Overlap Zoo

article 19 hours ago

NASA-JAXA XRISM Mission Sees Pulsar Gathering Companion’s ‘Wind’

NASA-JAXA XRISM Mission Sees Pulsar Gathering Companion’s ‘Wind’

article 5 days ago

NASA’s Hubble Spots an Out-of-Sync Galaxy

NASA’s Hubble Spots an Out-of-Sync Galaxy

article 5 days ago

Highlights

NASA-Funded Research Finds Complex Life Defying Record Heat

NASA-Funded Research Finds Complex Life Defying Record Heat

article 14 hours ago

Amendment 75: Corrections to several program elements regarding SciENcv and other topics

Amendment 75: Corrections to several program elements regarding SciENcv and other topics

article 15 hours ago

Hydrosphere (ROSES A.17)

Hydrosphere (ROSES A.17)

article 1 day ago

Highlights

Passion Meets Precision at NASA’s Flight Research Lab

Passion Meets Precision at NASA’s Flight Research Lab

article 6 days ago

NASA Johnson Pilots Chase Moon’s Shadow for Eclipse Science

NASA Johnson Pilots Chase Moon’s Shadow for Eclipse Science

article 4 weeks ago

NASA Selects University Teams to Help Advance Aviation Research

NASA Selects University Teams to Help Advance Aviation Research

article 1 month ago

Highlights

Helio and You: A Fresh Perspective on the Sun

Helio and You: A Fresh Perspective on the Sun

article 6 days ago

NASA Celebrates Restoration of Guam Station Damaged by Typhoon Mawar

NASA Celebrates Restoration of Guam Station Damaged by Typhoon Mawar

article 7 days ago

NASA’s Life-Saving Technology Where Cell Signals Can’t Go

NASA’s Life-Saving Technology Where Cell Signals Can’t Go

article 2 weeks ago

Featured

NASA Astronaut to Answer Questions from New Hampshire Students

NASA Astronaut to Answer Questions from New Hampshire Students

article 18 hours ago

NASA Kicks Off Nationwide Effort to Prepare Tomorrow’s Space Workforce

NASA Kicks Off Nationwide Effort to Prepare Tomorrow’s Space Workforce

article 1 day ago

NASA’s Integrated Medical Model (IMM)

NASA’s Integrated Medical Model (IMM)

article 7 days ago

Featured

NASA Awards SpaceX Three Crew Flights to Space Station

NASA Awards SpaceX Three Crew Flights to Space Station

article 5 days ago

Passion Meets Precision at NASA’s Flight Research Lab

Passion Meets Precision at NASA’s Flight Research Lab

article 6 days ago

NASA Welcomes Albania as Newest Artemis Accords Signatory

NASA Welcomes Albania as Newest Artemis Accords Signatory

article 1 day ago

Highlights

La NASA anuncia la cobertura de la misión lunar Artemis II

La NASA anuncia la cobertura de la misión lunar Artemis II

article 6 months ago

Agenda diaria de la misión a la Luna de Artemis II de la NASA

Agenda diaria de la misión a la Luna de Artemis II de la NASA

article 6 months ago

La NASA refuerza Artemis: añade una misión y perfecciona su arquitectura general

La NASA refuerza Artemis: añade una misión y perfecciona su arquitectura general

article 7 months ago

Sitemap

February 21, 1998

Home
Sitemap
1998
02
February 21, 1998

APOD: 1998 February 21 – Neptune: Big Blue Giant

National Aeronautics and Space Administration

NASA explores the unknown in air and space, innovates for the benefit of humanity, and inspires the world through discovery.

About NASA's Mission

Home
News & Events
Multimedia
NASA+
Missions
Humans in Space
Earth
The Solar System
The Universe
Science
Aeronautics
Technology
Learning Resources
About NASA
NASA en Español (opens in new tab)

Follow NASA

More NASA Social Accounts
NASA Newsletters

Sitemap
For Media
Privacy Policy
FOIA
No FEAR Act
Office of the IG (opens in new tab)
Budget & Annual Reports
Agency Financial Reports
Contact NASA
Accessibility

Responsible NASA Official:

Abigail Bowman

Was this page helpful?

Δ

Was this page helpful?

Yes

No