Loud rumbling is expected across South Mississippi on Wednesday. Here’s why

A loud rumbling could echo across Hancock County on Wednesday, because NASA’s Stennis Space Center will test a rocket engine that one day will help launch spacecraft to the moon.

Stennis Space Center will test the rocket engine early to mid afternoon, NASA said in a media advisory.

The test, scheduled for 12:16 p.m., will help determine whether the RS-25 engine can fuel the Orion spacecraft and the Space Launch System rocket — which NASA calls “the most powerful rocket in the world.” The Space Launch System rockets aim to send astronauts to the moon and Mars, according to NASA.

The engine test is part of the Artemis missions, and Wednesday’s test is the last of 12 completed so far.

The Stennis Space Center said that the test will be broadcast on Facebook, YouTube, X and Instagram. Viewers who join the Facebook, YouTube or X live stream 15 minutes early can listen to pre-test programming about the RS-25 engines and the Artemis missions.

NASA previously tested the RS-25 engines at Stennis Space Center in February.