Starlink is a satellite internet constellation operated by SpaceX, providing coverage to over 60 countries. It is the worlds first and largest satellite constellation using a low Earth orbit to deliver broadband internet capable of supporting streaming, online gaming, remote working, and more. Starlink satellites are designed to provide internet connectivity to underserved areas of the planet, as well as competitively priced service in more urbanized areas.

Here are some key facts about Starlink satellites:

• Number of Satellites: As of July 2023, there are 4,519 Starlink satellites in orbit, of which 4,487 are operational.

• Appearance: Starlink satellites can appear as a string of pearls or a "train" of bright lights moving across the night sky. They are easier to see a day or two after their launch and deployment, then become progressively harder to spot as they climb to their final orbital height of around 342 miles (550 km).

• Purpose: Starlink provides satellite-based internet connectivity to underserved areas of the planet, as well as competitively priced service in more urbanized areas. It also aims for global mobile phone service after 2023.

• Controversy: The Starlink satellites have been criticized for interfering with astronomical observations due to their brightness. They have also been used for warfare, such as connecting combat drones, naval drones, artillery fire coordination systems, and attacks on Russian positions.

In summary, Starlink is a satellite internet constellation operated by SpaceX that provides internet connectivity to underserved areas of the planet, as well as competitively priced service in more urbanized areas. It is the worlds first and largest satellite constellation using a low Earth orbit to deliver broadband internet capable of supporting streaming, online gaming, remote working, and more.