What kind of galaxy is the physically largest galaxy ever observed?
IC 1101 is one of the largest galaxy ever observed, and it would take light 2 million years to cross it. It sits at the center of a very large cluster of galaxies.
Do spiral galaxies show evidence of abundant amounts of dust and gas?
Spirals have an abundant gas supply, for two reasons: (i) dust accompanies gas clouds, and we have visual evidence for dust in spiral galaxies, and (ii) spirals are blue, indicating new stars, indicating the presence of gas. Only spirals contain both O and M type stars. All galaxies contain M type stars.
What is the galactic halo quizlet?
Galactic Halo: a spherical halo of old stars and clusters. Spiral galaxy: Our galaxy. Explain the importance of variable stars in determining the size and shape of our Galaxy. Knowing the luminosity, astronomers can apply the inverse square law to determine the distance.
What evidence supports the hypothesis of a supermassive black hole at the center of the Milky Way galaxy?
Direct evidence for a supermassive black hole a plot of the orbital motion of the star S2 around the centre of the Milky Way. From these observations, astronomers have inferred that a supermassive black hole of about 3 million solar masses lurks at the centre of our galaxy.
What is the best evidence for an extremely massive black hole in the center of the Milky Way?
What is the best evidence for an extremely massive black hole in the center of the Milky Way? The orbits of stars in the center of the galaxy indicate that the presence of 3 to 4 million solar mass object in a region no larger than our Solar System.
What kind of object do we think lies in the center of the Milky Way galaxy?
We live in the Milky Way Galaxy, which is a collection of stars, gas, dust, and a supermassive black hole at it’s very center. Our Galaxy is a spiral galaxy, which are rotating structures that are flat (disk-like) like a DVD when looked upon edge-on.
What are the 4 types of galaxies?
In 1936, Hubble debuted a way to classify galaxies, grouping them into four main types: spiral galaxies, lenticular galaxies, elliptical galaxies, and irregular galaxies.
Why does the Milky Way look curved?
Typically, the warped shape of a galaxy is caused by instabilities on the disk’s edge, where the galaxy’s gravitational forces are weaker and objects are more prone to bending and twisting. It’s a common phenomenon for spiral galaxies.
How can we see the Milky Way if were in it?
In order to see the Milky Way at all, you need seriously dark skies, away from the light polluted city. As the skies darken, the Milky Way will appear as a hazy fog across the sky. Imagine it as this vast disk of stars, with the Sun embedded right in it, about 27,000 light-years from the core.
What are the 5 most visible planets?
The five brightest planets – Mercury, Venus, Mars, Jupiter and Saturn – have been known since ancient times and can easily be seen with the naked eye if one knows when and where to look. They are visible for much of the year, except for short periods of time when they are too close to the Sun to observe.
Can we actually see the Milky Way galaxy from Earth?
The Milky Way used to be visible on every clear, moonless night, everywhere in the world. Today, however, most people live in places where it’s impossible to see the Milky Way because of widespread light pollution caused by lights left on all night long.
Is the Milky Way galaxy visible from Earth?
The Milky Way is visible from Earth as a hazy band of white light, some 30° wide, arching across the night sky. In night sky observing, although all the individual naked-eye stars in the entire sky are part of the Milky Way Galaxy, the term “Milky Way” is limited to this band of light.
Can you see Milky Way with eyes?
More than 100,000 light years in diameter, with more than 100 billion stars and at least as many planets, the Milky Way is arguably the most impressive feature of the night sky that you can see with the naked eye.
Where is the best place on earth to see the Milky Way?
Mount Desert Island
When can you see the Milky Way 2020?
The Galactic Center is visible from March to October and not visible from November to February. At the beginning of the Milky Way season, the Core becomes visible in the pre-dawn hours just before Sunrise, and remains above the horizon during daylight hours.
When can you see the Milky Way in Joshua Tree?
Joshua Tree is an amazing place to see the Milky Way. It’s easiest to see the Milky Way in Joshua Tree National Park in the summer.
Can you see the Milky Way with a full moon?
The Milky Way is only highly visible in the northern hemisphere during February to around September. Take into consideration which phase the moon currently is in. During a full moon you won’t be able to capture any of the Milky Way due to the reflective sun light washing out the night sky.
Is the Milky Way visible right now?
Generally the dense part of the Milky Way is best viewed when it is as high as possible in the Southern sky. Facing south during April and May the pre-dawn hours are best. From June to early August the best time is near midnight, though the Milky Way will be visible almost all night.
Is the Milky Way visible every night?
You can see the Milky Way all year, no matter where you are in the world. It’s visible just so long as the sky is clear and the light pollution is minimal. However, the Milky Way also appears to move in the sky, as the Earth rotates.
What planet is highly visible right now?
Bottom line: December 2020 presents three bright planets in the evening sky: Mars, Jupiter and Saturn, plus the brightest planet of them all in the morning sky: Venus. Jupiter and Saturn will have their once-in-20-years conjunction on December 21.5 days ago