Are there other solar systems in the Milky Way and if so, how many?

Answer Until the 1990s, scientists knew of no other solar systems in the Milky Way galaxy. They discovered other solar systems by observing slight gravitational pull on stars that suggested orbiting plane... Read More »

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How many solar systems are in the Milky Way?

According to the National Aeronautics and Space Administration, the exact number of solar systems in the Milky Way galaxy is unknown, but scientists estimate the number to be in the billions.Source... Read More »

What Keeps the Stars & Solar System in the Milky Way Galaxy Moving in a Spiral?

Gravity is what keeps stars and solar systems moving around the Milky Way in a spiral. The Milky Way can be divided into three areas, with only the galactic disk truly moving in a spiral; the orbit... Read More »

When will the Andromeda Galaxy collide with the Milky Way?

The Andromeda and Milky Way galaxies are moving toward each other at a speed of 75 miles per second. In 2 billion years, the galaxies will approach but overshoot each other. In 5 billion years, the... Read More »

School Projects on the Milky Way Galaxy?

The stars of the Milky Way live to be about 10 million years old. The sun is one of these stars, but it has only lived about half of its lifespan. A student can design a project that hypothesizes w... Read More »