Welcome to the official Solar System Planetary Clocks. These clocks display the current date and time on each planet in the solar system, scaled according to the unique rotational periods and orbit of each planet. The clocks update in real time with each second scaled to match the rotational periods of each planet.

Experience the world’s first and most advanced 3D interactive astronomical clock of the digital age. Understand the full potential of The Cosmic Watch. Point your phone or tablet towards the sky and get a real-time look at the constellations, stars and planets in space.

The planets today shows you where the planets are now as a live display - a free online orrery. In this solar system map you can see the planetary positions from 3000 BCE to 3000 CE, and also see when each planet is in retrograde.

2024年1月25日 · The time it takes for a signal – which moves at the speed of light through space – to travel from the spacecraft to Earth. From Saturn, one-way light time can range from about one hour and 14 minutes to one hour and 24 minutes.

Visualize orbits, relative positions and movements of the Solar System objects in an interactive 3D Solar System viewer and simulator.

Keep up with events in the sky and space. Notable dates for skywatchers and stargazers. Calendars, animations, and tips for catching shooting stars. What is a comet? What is an asteroid? Find and track the Sun, Moon, planets, and stars. Which planet is closest to Earth right now? Which are the biggest and smallest planets?

2016年11月18日 · Our clocks and calendars originate from the regular and predictable motions of the Earth, moon and sun. The first handmade clocks were works of art displayed prominently in the homes of the...

The Astronomical Clock provides at-a-glance understanding of the day / night cycle and celestial objects for your current forecast location. The clock updates in real time to keep you informed of the relative altitude of the planets and other deep space objects during a 24 hour cycle.

Many observatories will have a clock that shows the local sidereal time. To find out why, see the section on Hour Angle below. Astronomers make observations that span centuries. They need an easy method of finding the time between two dates regardless of leap days in a year, changes in how the calendar is calculated, etc.

What is the Solar Time and how long is a daytime at different places on the Earth? Rotation of the Earth The Earth's orbit around the Sun The course of a year ( January ):