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6 de oct. de 2016 · The oldest stars in the Milky Way are 13.4 billion years, give or take 800 million years. This is somewhat close to what the age of the Universe is (which hovers around 13.7 billion years).
The Milky Way is a barred spiral galaxy with a D 25 isophotal diameter estimated at 26.8 ± 1.1 kiloparsecs (87,400 ± 3,600 light-years), but only about 1,000 light-years thick at the spiral arms (more at the bulge).
18 de abr. de 2023 · The Milky Way is a barred spiral galaxy around 13.6 billion years old with large pivoting arms stretching out across the cosmos. Milky Way quick facts: – Galaxy type: Barred spiral – Age:...
- How Can Astronomers Study Things That Are So Far away?
- What Is The Most Distant Galaxy We Know of?
- What Can We Learn by Studying Distant Galaxies?
Astronomers use light to study things that are far away. In fact, light even gives us a way to look back in time! Light always travels at a certain speed: nearly 186,000 miles (300,000 kilometers) per second. That means that light can travel about 6 trillion miles (about 10 trillion kilometers) in one Earth year. We call this distance a light-year....
In 2016, astronomers used NASA's Hubble Space Telescopeto measure a galaxy called GN-z11 that is 13.4 billion light-years away. Because it is that far away, Hubble sees the light from the young galaxy as it was when the Universe was just 400 million years old.
Astronomers have observed lots of galaxies at different distances. By comparing them, we can begin to understand how galaxies and their stars are born, how they change and how they die over time.
Hace 2 días · Milky Way Galaxy, large spiral system consisting of several hundred billion stars, one of which is the Sun. It takes its name from the Milky Way, the irregular luminous band of stars and gas clouds that stretches across the sky as seen from Earth.
30 de sept. de 2022 · The Milky Way is estimated to be around 13-billion years old based on the age of subgiant stars within the Milky Way Galaxy.
25 de mar. de 2013 · For the oldest globular clusters in the Milky Way, this method yields a maximum age of around 13.3 billion years, with an uncertainty of about ±2 billion years.
