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

What’s Up: August 2026 Skywatching Tips from NASA

What’s Up: August 2026 Skywatching Tips from NASA

article2 weeks ago

NASA Telescopes Create Colorful ‘Craft’ From Nearby Nebula

NASA Telescopes Create Colorful ‘Craft’ From Nearby Nebula

article8 hours ago

Expedition 74 flight engineers (from left) Chris Williams, Jack Hathaway, Sophie Adenot, and Jessica Meir are inside the International Space Station’s cupola, waiting to observe the plasma trail of the Orion spacecraft—with the Artemis II crew aboard—as it reenters Earth’s atmosphere.

NASA Shares Station Research Today Supporting Moon, Mars Tomorrow

article9 hours 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

Curiosity Blog, Sols 4968-4974: Rock Climbing Towards the Discontinuity

Curiosity Blog, Sols 4968-4974: Rock Climbing Towards the Discontinuity

article 17 hours ago

Lion Nebula Roars to Life With NASA’s Webb

Lion Nebula Roars to Life With NASA’s Webb

article 1 day ago

NASA X-59 Explainer: Science of Sonic Booms

NASA X-59 Explainer: Science of Sonic Booms

article 1 day ago

Highlights

NASA Will Attempt to Observe Rocket Part’s Lunar Impact

NASA Will Attempt to Observe Rocket Part’s Lunar Impact

article 1 week ago

NASA Delivers Navigation System for Commercial Lunar Relay

NASA Delivers Navigation System for Commercial Lunar Relay

article 1 week ago

Establishing Crew Exposure Limits of Martian Dust

Establishing Crew Exposure Limits of Martian Dust

article 3 weeks ago

Highlights

Bountiful Roebuck Bay

Bountiful Roebuck Bay

article 19 hours ago

El Niño Alters Marine Life in the Pacific

El Niño Alters Marine Life in the Pacific

article 2 days ago

2026 IGARSS Hyperwall Schedule

2026 IGARSS Hyperwall Schedule

article 4 days ago

Highlights

NASA Completes Astronaut-Deployed Science Instrument for Lunar Surface

NASA Completes Astronaut-Deployed Science Instrument for Lunar Surface

article 4 hours ago

Community College Instructors Bring Astronomy Textbook Into 21st Century

Community College Instructors Bring Astronomy Textbook Into 21st Century

article 1 day ago

Helio and You: Studying Eclipses Near and Far

Helio and You: Studying Eclipses Near and Far

article 4 days ago

Featured

NASA Telescopes Create Colorful ‘Craft’ From Nearby Nebula

NASA Telescopes Create Colorful ‘Craft’ From Nearby Nebula

article 8 hours ago

Lion Nebula Roars to Life With NASA’s Webb

Lion Nebula Roars to Life With NASA’s Webb

article 1 day ago

Helio and You: Studying Eclipses Near and Far

Helio and You: Studying Eclipses Near and Far

article 4 days ago

Highlights

NASA Completes Astronaut-Deployed Science Instrument for Lunar Surface

NASA Completes Astronaut-Deployed Science Instrument for Lunar Surface

article 4 hours ago

Lion Nebula Roars to Life With NASA’s Webb

Lion Nebula Roars to Life With NASA’s Webb

article 1 day ago

Helio and You: Studying Eclipses Near and Far

Helio and You: Studying Eclipses Near and Far

article 4 days ago

Highlights

Michael T. Lippert

Michael T. Lippert

article 3 weeks ago

NASA, GE Aerospace Work Enables Hybrid-Electric Flight Demonstration

NASA, GE Aerospace Work Enables Hybrid-Electric Flight Demonstration

article 3 weeks ago

NASA Pushes New Wing Design to Find Structural Limits

NASA Pushes New Wing Design to Find Structural Limits

article 4 weeks ago

Highlights

NASA Completes Astronaut-Deployed Science Instrument for Lunar Surface

NASA Completes Astronaut-Deployed Science Instrument for Lunar Surface

article 4 hours ago

Update to A.1 Earth Science Research Overview: Earth Science proposals that include NASA high-end computing resources must include costs

Update to A.1 Earth Science Research Overview: Earth Science proposals that include NASA high-end computing resources must include costs

article 1 week ago

NASA Delivers Navigation System for Commercial Lunar Relay

NASA Delivers Navigation System for Commercial Lunar Relay

article 1 week ago

Featured

Launch Into a New School Year With NASA

Launch Into a New School Year With NASA

article 1 day ago

Featured

NASA+ Debuts on discovery+, Coming Soon to HBO Max

NASA+ Debuts on discovery+, Coming Soon to HBO Max

article 1 day ago

NASA Shares Station Research Today Supporting Moon, Mars Tomorrow

NASA Shares Station Research Today Supporting Moon, Mars Tomorrow

article 9 hours ago

Building the Moon Base: NASA Stories at the Ion

Building the Moon Base: NASA Stories at the Ion

article 9 hours 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 5 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 5 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 5 months ago

Sitemap

January 17, 2000

Home
Sitemap
2000
01
January 17, 2000

APOD: 2000 January 17 – V4641 Sgr: The Closest Black Hole Candidate

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