asteroids in the next 100 years. the smaller asteroids, this is about 140 metres across asteroids, this is about 140 metres across, those are the ones we do not find so across, those are the ones we do not find so easily across, those are the ones we do not find so easily. telescopes look the things find so easily. telescopes look the things that move in the sky, and they things that move in the sky, and they are things that move in the sky, and they are very faint if they are very small they are very faint if they are very small because they don t reflect the sun s small because they don t reflect the sun s light small because they don t reflect the sun s light unlike the moon which is huge. sun s light unlike the moon which is huge. and sun s light unlike the moon which is huge, and you can see a shadow on a full moon huge, and you can see a shadow on a full moon night. but they are so faint full moon night. but they are so faint that full moon night. but they
they re about to launch the falcon nine rocket. when that reaches space it will release a craft called dart. in about ten months, dart will then smash into a huge rock called dimorphos to see how much its speed and path can be altered. the idea is to test out technology that might one day be needed to push a dangerous asteroid off course if it s headed for earth. we can speak now to dr becky smethurst, an astrophysicist from the university of oxford. we can also see, becky, pictures, the rocket is about to take up very shortly, live in california and it will blast into space and begin this mission. tell us what we are seeing and why this matters. it’s mission. tell us what we are seeing and why this matters. and why this matters. it s an incredible and why this matters. it s an