Skip to main content (Press Enter).
Official Website of the United States Navy
About Us
Mission & Vision
Strategic Plan
History
Leadership
Commander
All Leadership
Organization
Naval Oceanographic Office
Fleet Numerical Meteorology & Oceanography Center
United States Naval Observatory
News from the Naval Observatory
Earth Orientation Department
USNO Earth Orientation Products
Daily Solutions
Weekly Solutions
Bulletin A
Contents of Bulletin A
Long-term Delta-T
USNO GPS Products
GPS User Information
Rapids
Ultras
UTGPS
USNO VLBI-based Products
VLBI Correlator Data
VLBI-based Earth Orientation Parameters (EOP)
Earth Orientation Information Center
General Information about Earth Orientation
Frequently Asked Questions About Earth Orientation
Suggested Reading
What Is Earth Orientation?
What Is Polar Motion?
What does the Earth rotation coordinate measure?
What is the Celestial Pole Offset?
What is a Leap Second?
How do we measure Earth Orientation?
What causes variations in the Earth's orientation?
Who uses Earth orientation information?
Publications About Earth Orientation Products
Scientific Publications
Earth Orientation Software
Precise Time Department
The USNO Master Clock
The USNO Master Clock
Time Dissemination at the USNO
USNO Alternate Master Clock (AMC)
Cesium Atomic Clocks
Hydrogen Masers at the USNO
Rubidium Fountain Clocks
USNO Time Scales
International Time Scales and the BIPM
Definitions of Systems of Time
Global Positioning System
Global Positioning System Overview
USNO GPS Data Categories Explanation
CGGTTS Data Format
USNO GPS Time Transfer
Leap Seconds
GPS Information: SA, DGPS, Leap Seconds, etc.
GPS Week Number Rollover
GPS Timing Data and Information
USNO Format Explanation
USNO Computer Display Clocks
Two-Way Satellite Time Transfer (TWSTT)
Telephone Time
Network Time Protocol (NTP)
US Eastern Time Zone NTP Servers
US Mountain Time Zone Servers
DoD Customer Servers
Astronomical Applications Department
About Us
Software Products
Publications
Astronomical Information Center
Astronomical Data and Litigation
Data Services
Celestial Reference Frame Department
Optical/IR Products
Naval Oceanography Operations Command
Fleet Weather Center - Norfolk
Fleet Weather Center - San Diego
Exercises
ANTX
ANTX 2020
ANTX 2019
Press Room
News Stories
Press Releases
Photo Gallery
Video Gallery
Public Use of Limitations
Work With Us
Contact Us
Navy.mil Underway
Facebook
Twitter
Blog Feed
YouTube
Flickr
Pinterest
Instagram
United States of America Department of the Navy Seal
The Sky This Week
U.S. Naval Observatory's Weekly Blog
Results:
Tag:
Saturn
Latest Blogs
RSS
Naval observatory
Moon
stars
planets
Venus
Jupiter
Saturn
Into the Mouth of the Southern Fish
Geoff Chester, USNO Public Affairs
in
on Nov. 9, 2021
The autumn sky's brightest star has some interesting characteristics.
Read More
Naval observatory
Perseus
Globe at Night
Halloween
cross-quarter days
Venus
Jupiter
Saturn
Mercury
Treats to See in the Halloween Sky
Geoff Chester, USNO Public Affairs
in
on Oct. 26, 2021
If you have a telescope, share the view with your Halloween visitors!
Read More
Naval observatory
Moon
planets
stars
star clusters
Double stars
Venus
Mercury
Jupiter
Saturn
What's There To See Under a Bright Fall Moon?
Geoff Chester, USNO Public Affairs
in
on Oct. 19, 2021
When a bright Moon washes out the evening sky, here are some things to point your optics toward.
Read More
Naval observatory
Moon
planets
Venus
Jupiter
Saturn
constellations
sky lore
Some Stories in the Stars
Geoff Chester, USNO Public Affairs
in
on Oct. 5, 2021
The autumn sky is full of mythological tales.
Read More
Naval observatory
Moon
planets
stars
galaxies
Venus
Jupiter
Saturn
The Horse in the Square
Geoff Chester, USNO Public Affairs
in
on Sept. 28, 2021
Count stars in Pegasus for science, and find the most distantthing you can see with your eyes alone.
Read More
Naval observatory
Moon
planets
Venus
Saturn
Jupiter
stars
Milky Way
Dog Days and Summer's Haze
Geoff Chester, USNO Public Affairs
in
on Aug. 3, 2021
How the "Dog days" got their name, and hazy sights in the summer sky.
Read More
Naval observatory
Moon
planets
Venus
Mars
Jupi
Saturn
stars
Hazy Nights with the Thunder Moon
Geoff Chester, USNO Public Affairs
in
on July 20, 2021
Scattered moonlight and smoke from distant wildfires subdue the views of the summer sky.
Read More
Naval observatory
sun
Moon
Solstice
planets
Venus
Mars
Jupiter
Saturn
Marking the Summer Solstice (We've been at it for a long time!)
Geoff Chester, USNO Public Affairs
in
on June 15, 2021
The summer solstice was perhaps the most important day in the calendars of ancient cultures, judging by what they left behind.
Read More
Naval observatory
Moon
planets
Venus
Mars
Jupiter
Saturn
stars
constellations
Hercules
star clusters
Seeing the Strongman's Stars
Geoff Chester, USNO Public Affairs
in
on June 1, 2021
The constellation Hercules is a good measure of the darkness of the sky, and it has some really cool things to see.
Read More
Naval observatory
Moon
Lunar Eclipse
stars
planets
Mercury
Venus
Mars
Jupiter
Saturn
A Lunar Eclipse...For Some of Us!
Geoff Chester, USNO Public Affairs
in
on May 18, 2021
About half the nation gets a total lunar eclipse at dawn.
Read More
Previous
1
2
3
Next
Navy.mil
|
Navy.com
|
Navy FOIA
|
DoD Accessibility/Section 508
|
No Fear Act
|
Open Government
|
Plain Writing Act
USA.gov
|
Veterans Crisis Line
|
DoD Safe Helpline
|
Navy SAPR
|
NCIS Tips
|
Privacy Policy
|
Contact Webmaster
Commander, Naval Meteorology and Oceanography Command | 1100 Balch Blvd. | Stennis Space Center, Mississippi 39529
Official U.S. Navy Website