Devas by nature are associated with phenomenon at every level of existence. The play an important role at the cosmic scale as well. Rishis recognized the roles of Devas at a cosmic scale and assigned different divisions of the Sky, called the Nakshatras, to each of them. Indra controls the Nakshatra region which lies very close to the center of the Milkyway. Astronomers have found this region to be close to the galactic center which controls the level of star formation activity in the entire galaxy.
A recent paper published in the International center for radio astronomy research newsletter explains why some galaxies exhaust their supply of star forming raw material rapidly. We can extend the analogy of rain clouds to raw material in a galaxy and immediately grasp the roles of Indra and Vritra there. The Vedic deity Brihaspati supports the growth phase of a nascent system. His role is seen in the maturing of a rain cloud. The Asura Vala, his the arch rival, aborts the crucial growth phase.