Space is not matter. Matter is composed of elementary particles (so is energy), but space is composed of the three commonly understood dimensions. Space is possible without any matter or energy present at all. Energy and matter, on the other hand, are very closely related. read more
No space is not matter. It’s just behave like matter. I think you have heard about space time. Space can be bend or twist. Gravity can bend or twist the space , higher the gravity larger the bending of space and rotation of matter twist the space like earth rotation. read more