SpaceX’s Starship finally reached orbital speed. The massive rocket, designed to eventually take humans to Mars, launched from SpaceX’s Starbase facility in South Texas at 8:25 CT (1325 GMT ...

This means that objects in small orbits travel faster than objects in large orbits. The graph shows how the orbital speed of a planet changes with its distance from the Sun.

These planets are typically characterized by their small size, proximity to their stars, and extremely short orbital periods. TOI-3261 b is one of only four known exoplanets in this category.

Our Sun is on one of the spiral arms as shown in the diagram: The Sun's orbital speed is determined almost entirely by the gravitational pull of matter inside its orbit. The expected orbital speed ...