What are the 3 major types of galaxies?
Astronomers classify galaxies into three major categories: elliptical, spiral and irregular. These galaxies span a wide range of sizes, from dwarf galaxies containing as few as 100 million stars to giant galaxies with more than a trillion stars.
What is older than the universe?
Our Sun is about 4.5 billion years old. Since HD 140283 is a Population II star, it is older. In fact, it is the oldest star with a well-determined age. Because of this, astronomers colloquially call the star “the Methuselah star.” Initial estimates of its age were in excess of 14 billion years.
What is the oldest star in our galaxy?
Methuselah star
What is a galaxy class 6?
A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity. It’s a small part of the Milky Way Galaxy. A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems. A galaxy is held together by gravity.
What is a ghost galaxy?
The Ant 2 “ghost” galaxy is a large, dim dwarf galaxy that scientists have discovered near the edge of the Milky Way. While low in mass, Ant 2 is about the same size as the Large Magellanic Cloud (LMC).
Do dwarf galaxies have black holes?
Visible-light images of dwarf galaxies now shown to have massive black holes. Center illustration is an artist’s concept of the rotating disk of material falling into such a black hole, and the jets of material propelled outward. Image via Sophia Dagnello/ NRAO/ AUI/ NSF/ DECaLS survey/ CTIO.
What are some galaxies near the Milky Way?
The Magellanic Clouds are irregular dwarf galaxies orbiting our Milky Way galaxy. The LMC is full of interesting objects including diffuse nebulae, globular and open clusters, planetary nebulae, and more.
What is behind the Milky Way?
Astronomers have discovered a vast assemblage of galaxies hidden behind our own, in the “zone of avoidance.” The entire conglomeration is behind the Milky Way, in what astronomers quaintly call the zone of avoidance. An international team of astronomers led by Daniel Pomarède of Paris-Saclay University and R.
Is Milky Way in a void?
“The galaxies in the universe are found in a network of clusters, filaments, and voids—’the cosmic web,'” Tully told Newsweek. “Our Milky Way Galaxy lies in a filament but it is immediately bounded by a large empty region that I identified in 1987 and called the ‘Local Void.
Is the Milky Way moving?
The Milky Way as a whole is moving at a velocity of approximately 600 km per second with respect to extragalactic frames of reference. The oldest stars in the Milky Way are nearly as old as the Universe itself and thus probably formed shortly after the Dark Ages of the Big Bang.
How can we see the Milky Way if we are in the Milky Way?
The stars of the Milky Way merge together into a single band of light. But through a telescope, we see the Milky Way for what it truly is: a spiral arm of our galaxy. We can’t get outside the Milky Way, so we have to rely on artist’s concepts, like this one, to show us how it might look.
How much of the Milky Way can we see?
0.000003% percent
What Does the Milky Way really look like?
The Milky Way is a spiral galaxy. The spiral arms contain stars, cold molecular gas, glowing star- forming regions and dark dust. The galactic bulge contains mainly older stars, and appears redder than the spiral arms. Since the central bulge is elongated, the Milky Way is classified as a barred spiral galaxy.
How do we know what the Milky Way looks like?
Shapley concluded (and other astronomers have since verified) that the center of the distribution of globular clusters is the center of the Milky Way as well, so our galaxy looks like a flat disk of stars embedded in a spherical cloud, or ‘halo,’ of globular clusters.
How did they take a picture of the Milky Way?
Powerful telescopes like Hubble, Chandra, and Spitzer (and soon, James Webb) capture images of our galaxy in many different light wavelengths, which astronomers piece back together so they can see past the gas and dust as far into the center as possible.
How many stars does the Milky Way have?
100 thousand million stars
When can I see the Milky Way 2020?
When is the Milky Way visible? Between March our galaxy is visible if you get up before dawn, in summer it can be seen at midnight, and by October it’s on show right after dusk. If there’s no light pollution to block your view it’s possible to see the Milky Way galaxy arcing overhead.
How many galaxies Does the Milky Way have?
100 billion galaxies
Where is the Milky Way in the universe?
The Milky Way galaxy is in the Local Group, a neighborhood of about 30 galaxies. Our nearest major neighboring galaxy is called Andromeda.
Can you reach the edge of the universe?
There is no edge to the universe, as far as we know. There’s an edge to the observable universe—we can only see so far out. That’s because light travels at a finite speed (one light-year per year), so as we look at distant things we’re also looking backward in time.