The alternative theory to the Big Bang theory that is being described here is the Steady State Universe (option 2). This theory was developed in 1948 as an alternative explanation for the expansion of the universe. The Steady State Universe proposes that while the universe is indeed expanding, it remains unchanged in overall appearance and characteristics over time. According to this theory, new matter is continuously being created to fill in the gaps left by the expanding universe, maintaining a constant density. This idea stands in contrast to the Big Bang theory, which suggests that the universe began with a singularity and has been expanding ever since. It is important to note that the Steady State Universe theory is not widely accepted in the scientific community, and the evidence strongly supports the Big Bang theory as the most accurate explanation of the origins and expansion of the universe.