Ariane 6 booster from below on the launch pad

Ariane 6 on the launch pad at Europe's Spaceport in French Guiana ready for liftoff with Sentinel-1D.
This view shows the nozzle of one of the two boosters that Ariane 6 will use to launch Sentinel-1D.

Ariane 6 comes with boosters that produce thrust each that is equal to more than 35 jet engines. Every Ariane 6 has at least two boosters, and an Ariane 6 can be equipped with four, depending on the weight and destination of the satellites it pushes into space. The boosters consume 142 000 kg of solid propellant in just over two minutes, like fireworks, once the boosters are ignited there is no going back, the engines will consume their solid propellant until they run out of fuel. The boosters are developed by Europropulsion, owned by Avio and ArianeGroup and their industrial partners in Europe that design and build the Vega and Ariane 6 rockets. They are used for Ariane 6 as well as in the first stage of Vega, ESA’s rocket for smaller payloads.

The Sentinel-1 mission will continue to deliver radar images of Earth’s surface, performing in all weathers, day-and-night, providing a service vital for users who depend on frequent updates of critical data, such as disaster response teams, environmental agencies, maritime authorities and climate scientists.

Ariane 6 is Europe's heavy-lift rocket, this flight is designated VA265.