An online astrophysics student calculates that a distant star emits energy at a luminosity of \( 3.8 \times 10^{26} \) watts. If 1 watt equals 1 joule per second, and the student wants to know how many joules of energy the star emits in 2.5 Earth years (assuming 365.25 days per year), what is the total energy in scientific notation?

Tue, 05 May 2026 08:41:30 +0000

Content under review