Galaxies

The Sloan Great Wall is a large group of galaxies.

The shape of group is a bit like a wall. These sorts of groups are also called "galaxy filaments".

elliptical galxies

This may refer to the so-called "flocculent galaxies". Perhaps it's the "multiple arm galaxies", which are sometimes put in with the flocculent type.

To keep the mood fun, ask questions about things which the person is interested in. For example, if they love watching pretty little liars, ask them who they think a is (bad example, sorry :P). If you don't know about their interests, ask them- e.g. 'whats your favourite tv show?'. Maybe you could crack a couple of jokes. Just always make sure you are kind, and are not rude or nosy, then you can keep the mood fun :)

For a variety of reasons though to understand physics is a good one. Quantum mechanics along with attempts at merging it with the workings of the heavens and testing of its theories have given rise to a number of conveniences. Namely, the modern microchip.

No. But most spiral and elliptical galaxies do.

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The most common elements in the Universe are hydrogen and helium. For additional elements, check the Wikipedia article on "Abundance of the chemical elements".

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The Milky Way is both disk-like and spiral in shape. It is a barred spiral galaxy, meaning it has a flat, rotating disk with spiral arms emanating from a central bar. This shape is common among spiral galaxies due to the rotation of stars and gas in the galaxy.

The MACS0647-JD galaxy (full name CZC2013 MACS0647-JD1; one of the gravitationally lensed galaxies in the MACS J0647+7015 galaxy cluster) is a dwarf galaxy 13,300 million light-years (redshift of 10.7) from Earth in the Camelopardalis constellation, and is 600 light-years in diameter (about 170 times smaller than the Milky Way), and contains about 1 billion stars (1 percent of the Milky Way's stars). In 13.3 billion years from now, it will be a fully-formed galaxy.

In the vastness of space, galaxies are generally not close to each other. The space between galaxies is immense, with distances measured in millions of light-years. However, there are instances where galaxies can come relatively close together due to gravitational interactions or as part of galaxy clusters.

The gravitational influence of mass contained within an orbit of a particular size determines the speed (and therefore period) of that orbit. So by measuring the period and size of the orbit, we can determine the mass inside the orbit. This concept works equally well for the orbits of stars and gas within spiral galaxies. By looking at the mass inside the orbit of stars or gas at different distances from the center of the galaxy, the mass of a galaxy as a function of radial distance from the center the mass of a galaxy inside radius r obtained from the rotation curve of the galaxy.

What have we learned?

In discussing the orbits of planets around a star, or the orbits of stars around the center of the galaxy, the mass inside the orbit determines, via gravity, the properties of the orbit. The difference here is that if you look at a bigger orbit (farther from the center), the mass inside that orbit is bigger than the mass inside the smaller orbit. We have to remember that the mass of the planets is insignificant compared to the mass of the star. I as well learned the expression for the mass enclosed within an orbit of radius r is M = v2r/G, where G is Newton's gravitational constant (and v is the orbital speed of a star at distance r. This formula is essentially another way of writing Kepler's Law Porb2 = constant * r3.)

Andromeda is heading straight for us here in the Milky Way, and the two galaxies are going to collide. Don't lose any sleep over this; it isn't going to happen for roughly four billion years. By then the earth will very likely no longer be inhabited, and who knows where are descendants will be, if there will be any at all?

Our Sun may look big to us and it is. It is about 109 times larger than Earth

However, in comparison to other stars, our Sun is small. Our Sun is just an average sized star.

See related video for a comparison.

The largest Galaxy ever discovered was IC1101, an Elliptical Galaxy, but the most common large ones are Spirals such as the biggest Galaxies in the Local Group, Andromeda, Milky Way, and Triangulum; all Spirals.

Any star that can be seen with the naked eye - and those are usually the ones that have proper names - is in our own galaxy, the Milky Way.

Our Solar System Formed from the remnants of a star wich went supernovae (at least approx 5 billion years ago) the dust from that star started to condense (due to the passing another star or some other mechanism), spinning counter-clockwise, the pressure at the center of this cloud became great enough to start a process know as nuclear fussion (triple alpha process) creating a proto-star, wich was significantly dimmer and smaller than todays Sol. The remaining dust accreted to from proto-planets (maybe upwards of 100), These proto-Planets smashed into each-other and merged to become the inner planets. As for our gas-giants, they formed from cold gas and dust, beyond what is known as the "Frost Line" due to the required colder temperatures to form Gas Planets.

Constellation :)

There are over 100 billion galaxies (with 100 billion+ stars (each containing 9 planets and 170+ moons)) in each one; as well as asteroid belts and nebulae) in the Cowboy Bebop universe. Their light has taken 13 billion years to reach Earth.

Jackson Galaxy, known as an animal behaviorist and host of "My Cat from Hell," is also a musician. He performs with a band called "The Jackson Galaxy Band." The band blends various musical styles, reflecting Galaxy's diverse artistic influences. Their music often incorporates themes related to animals and the human-animal bond.