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data source from spacepalce.naga.gov

data source from youtybe.com

Take a look at the topics we going to discuss in this article

how galaxies were created?

1. Big Bang and initial conditions

2. Cosmic inflation and Dark matter

3. Galaxy Evolution

Key Concepts

what is the center of a galaxy?

1. supermassive black hole

2. Galactic nucleus

3. Central Bulge

Explains of Galaxy Centers

Observational Techniques

what are the types of galaxies?

1. Elliptical Galaxies:

2. Spiral Galaxy:

3. Irregular Galaxies:

4. Lenticular Galaxies:

why do we call it the Milky Way?

how do scientists discover new galaxies?

1. Telescopes:

2. Survey projects:

3. Spectroscopy:

4. Gravitational lensing:

5. Data analysis and machine learning:

what is the biggest and smallest galaxy in the universe?

Largest Galaxy: IC 1101

Smallest Galaxy: Segue 2

how do we even measure galaxy size?

1. Direct Imaging:

2. Distance Measurement:

3. Physical Size Calculation:

4. HI(Neutral Hydrogen) Mapping:

5. Infrared and X-ray Observations:


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