The statement that space is a void and the universe is the sum total of all the objects in space is in alignment with a commonly accepted understanding of the universe. In modern cosmology, space is often described as a vast expanse that contains galaxies, stars, planets, and other celestial objects.
The concept of gravity as a force exerted by massive objects is also consistent with the theory of general relativity proposed by Albert Einstein. According to this theory, massive objects, such as stars and planets, curve the fabric of spacetime, causing other objects to move along curved paths in response to this curvature. This effect is commonly referred to as gravity.
The understanding of space and gravity as described above has been widely accepted and supported by empirical observations and experiments. The general relativity theory has been tested and confirmed in numerous experiments, and the effects of gravity have been observed and measured extensively.
However, it's important to note that our current understanding of the universe and gravity is based on scientific theories and empirical evidence. As our knowledge and technology advance, our understanding of these concepts may continue to evolve. Scientists are continually exploring and investigating the nature of space, the universe, and gravity to deepen our understanding of these fundamental aspects of the cosmos.