The study of ancient and modern astronomy demonstrates that both contain teachings which are expressions of the universal truths contained in the fundamental principles of Theosophy. The first fundamental principle of Theosophy refers to the absoluteness of the Causeless Cause of the manifested universe. All that manifests from that one absolute principle has the twofold aspect of consciousness and matter. The homogeneous primordial substance eventually manifests as the complex heterogeneous physical matter known to the physicist. Scientists are still searching for that primordial substance they intuitively accept.
Modern astrophysicists believe that all the stars and planets evolved from a primordial substance.
At a certain point that primordial substance condensed into whirling clouds of cosmic dust and luminous gases called nebulae. Instruments such as the spectroscope have been used to analyze the light of several nebulae. However, the idea of the origin of worlds, solar systems, and stars out of nebulae is a very ancient teaching. On the basis of the ancient teaching that the Sun and planets developed from the same nebular condensation of primordial matter, H. P. Blavatsky rejected the nebular theory as it was originally advanced by Kant and Laplace in the 18th Century. The original theory taught that the planets were formed as they spun off from the Sun.