The easy answer is that it does not need to have any other justification than that it makes your life better. If you find life-affirming enjoyment in the discovery and understanding then that is all that is required.
On a deeper level, consider the simple fact that a modest telescope like a 4-inch refractor or a 5-inch reflector, even a 70mm National Geographic “department store” telescope will reveal that many stars perceived as solitary objects to the naked eye are pairs and multiples. For thousands of years - even 200 years after Galileo - we always assumed that the stars were individual objects, more-or-less randomly distributed. You can find the truth for yourself if you care to invest in the instrument and invest your time.
I started another discussion on this here that garnered some response.
https://forum.objectivismonline.com/index.php?/topic/34192-any-other-astronomers-here/
And I posted this:
https://forum.objectivismonline.com/index.php?/topic/34132-the-jupiter-saturn-conjunction-of-2020/