The picture shows a wealth of detail including several nodes of Hydrogen Alpha nebulosity denoting star forming regions showing up red in the outer spiral arms.
What does Ha stand for?
Ha stands for Hydrogen Alpha
This definition appears very frequently and is found in the following Acronym Finder categories:
- Science, medicine, engineering, etc.
See other definitions of Ha
We have 65 other meanings of Ha in our Acronym Attic
- Hull Array
- Human Anatomy (college course)
- Humanitarian Assistance
- Humanitarian Assistance (US DoD)
- Humic Acid
- Hyaluronic Acid
- Hybrid Algorithm
- Hybrid Amplifier
- Hydraulic Association (UK)
- Hydrocephalus Association
- Hypnotherapy Association
- La Habana (postcode, Cuba)
- High Assurance and Critical Computing System
- Helicopter Attack Squadron Light (US Navy aviation unit designation used 1967-72 and again 1976-88)
- Heterophile Antibody Positive (mononucleosis term)
- High Availability Automated Control System Library Server
- High Availability-Base Station Manager
- Hospital-Acquired Methicillin-Resistant Staphylococcus Aureus
Samples in periodicals archive:
In addition, the Department has purchased three solar filters: a Thousand Oaks Optical Type 2 Plus Filter for the 12" Meade, a Thousand Oaks Optical Hydrogen Alpha Filter for the 12" Meade, and a Thousand Oaks Optical Type 2 Plus for our Celestron 5.