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2. Milky Way - Wikipedia

   en.wikipedia.org/wiki/Milky_Way

   The Milky Way is the galaxy that includes the Solar System, with the name describing the galaxy's appearance from Earth: a hazy band of light seen in the night sky formed from stars that cannot be individually distinguished by the naked eye.

3. Orion Arm - Wikipedia

   en.wikipedia.org/wiki/Orion_Arm

   The Orion Arm, also known as the Orion–Cygnus Arm, is a minor spiral arm within the Milky Way Galaxy spanning 3,500 light-years (1,100 parsecs) in width and extending roughly 10,000 light-years (3,100 parsecs) in length. [2] This galactic structure encompasses the Solar System, including Earth.

4. Galactic Center - Wikipedia

   en.wikipedia.org/wiki/Galactic_Center

   The Galactic Center is the barycenter of the Milky Way and a corresponding point on the rotational axis of the galaxy. [1] [2] Its central massive object is a supermassive black hole of about 4 million solar masses , which is called Sagittarius A* , [3] [4] [5] a compact radio source which is almost exactly at the galactic rotational center.

5. Sagittarius A* - Wikipedia

   en.wikipedia.org/wiki/Sagittarius_A*

   Based on mass and increasingly precise radius limits, astronomers have concluded that Sagittarius A* must be the central supermassive black hole of the Milky Way galaxy. The current value of its mass is 4.297 ± 0.012 million solar masses .

6. Earliest building blocks of the Milky Way discovered near its ...

   www.aol.com/galactic-archaeology-reveals-two...

   Astronomers have used the Gaia space telescope to spy some of the first building blocks of the Milky Way galaxy: two ancient streams of stars named Shakti and Shiva that helped our home galaxy ...

7. Andromeda–Milky Way collision - Wikipedia

   en.wikipedia.org/wiki/Andromeda–Milky_Way...

   The Andromeda–Milky Way collision is a galactic collision predicted to occur in about 4.5 billion years between the two largest galaxies in the Local Group —the Milky Way (which contains the Solar System and Earth) and the Andromeda Galaxy. [1] [2] [3] [4] [5] The stars involved are sufficiently far apart that it is improbable that any of ...