Lightroom is likely applying its own RAW rendering rather than your camera’s JPEG-style processing. With RAW files, Lightroom does not show the in-camera look unless you choose a matching camera profile, and very dark scenes like a lunar eclipse can also look odd if auto settings were applied.

Try this:

• In Develop, click Reset to make sure no exposure/basic adjustments were automatically applied.
• Check that the Basic sliders are at their defaults.
• In Camera Calibration (or the profile area in newer Lightroom versions), switch from Adobe’s default profile to a camera-matching profile.

That usually makes the RAW preview look much closer to the camera JPEG and to what other software may be showing.

If that fixes it, you can save it as the default for that camera/file type so future imports use the same profile automatically.