Are There Really Unlimited Stars in an Infinite Universe

We know that the universe is expanding because, with a few nearby exceptions, almost every galaxy in is moving away from us and from one another. As distant galaxies appear to be receding even more quickly, there is evidence that the universe is expanding at an increasing rate.

Sometimes, just looking up to the sky is enough to grasp the tremendous vastness of space. With hundreds of thousands of stars, astronomers think that there are more stars in our universe than there are grains of sand on all the beaches on Earth. And while this number may not be unlimited, it is certainly pretty impressive.
This is a piece of good news for everyone looking to buy a star for a special someone this holiday season. There are 100 billion stars in our very own Milky Way galaxy alone, your friends, family, relatives and even colleagues can enjoy a very special gift.

The space that we can observe, does have a definite size, but it is big enough to house all the stars you would like named after the people in your life that matter. Because the universe was born 13.8 billion years ago, we can only observe objects whose light has travelled at most 13.8 billion years to reach Earth. This portion of the universe is called the observable universe, and it’s the only part of the universe we can know anything about.
Choose from a large private registry service that names clearly visible stars that will follow you wherever you go into the night. You can find and easily retrieve the stars we name at the Star Register page. After you purchase a star as a gift, you can even add a personal message and dedication to make this a truly unforgettable experience for someone.

Many things have come and gone, but history remembers Sirius and all other brightly lit stars that we continue tracing on the sky. Why not build an entire constellation for you, your friends, and family that will keep you looking up every night, from any point of the globe, and feel the love, friendship and closeness – no matter the distance?

The advantages of stargazing

The thrilling alignment of Jupiter and Venus this week promised love, luck and exciting change well into 2018. Not to mention it was one of the best sights in the night sky until the end of this year. The two brightest planets in our solar system put on a spectacular show and their sensational display showed them so close they were almost touching.

Thrilled stargazers across the world had to get up early before sunrise to catch a glimpse of the sky but it paid off. The stunning dance of the planets was just one of the advantages of stargazing. The ensuing effects this astrological phenomenon will create memories that last a lifetime.

The conjunction we witnessed in the sky last week is the most powerful of all planetary relationships.

It happens two or more planets align and fuse their powers, magnifying the effects each would normally exhibit on their own. Wherever one wields its influence, the other does the same.

But what traits do Venus and Jupiter each bring to their celestial union? Since Venus represents love, peace and harmony as well as money and exchange, and Jupiter – growth wisdom, wealth, morality, justice, faith, fortune, success, excess – this is truly a powerful union.

Venus and Jupiter align every year, but their display is only easily visible every 15 to 20 years, as the Sun usually blocks our view. But the effects of the alignment are clear to see.

Last year, they united in Virgo just as a ceasefire was announced in Colombia, ending 52 years of civil war; soon afterwards, Mother Teresa was made a saint.

This alignment has not arrived in Scorpio for more than a decade and this is a unique combination. Scorpio represents power and control, Jupiter is a figure of justice, and Venus helps bring about peace.

So aside from a spectacular sight that illuminated the morning sky, this event is significant in a myriad of other ways. It is one of those rare natural occurrences that can be shared with a loved one to really bring you closer and make you rethink what’s important in life. Because the moment you hold your significant other closer and gaze at nature’s most beautiful night show, a whole new level of appreciation will wash over you.

In fact, few things are as a romantic as a late night stroll underneath the starry sky and there are ways to make such a moment last forever. Why not name a star after someone you hold dear, so every time they look up to the sky – they know just how much they mean to you? We offer a special package with a gift certificate to include a personal message to someone close to your heart.

Make stargazing a truly personal and shared experience of a lifetime thanks to a gift that goes the extra mile.

Do Stars Within A Galaxy Touch One Another?

Many body problems with contact forces, like grains of sand on a beach, are quite hard to solve satisfactorily with a computer. Is there a similar problem with galaxies where the stars are in gravitational contact, and could that be a factor in the problem with the galactic rotation curves not turning out as expected?

Grains of sand are still pretty tricky to model as convincing-looking sand. And as much as we use grains of sand as a metaphor for the number of stars in a galaxy, stars and sand can be a pretty poor comparison if you take the metaphor too far. Galaxies may appear to be solid objects in our skies, with tightly packed clusters of stars, but in fact, galaxies contain huge amounts of empty space. The problem is that for most galaxies, we don’t have the observing power required to distinguish the individual stars, and so the stellar multitudes blur their light together.

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If we start to look around within our own galaxy – for instance around our own solar system – we can get a handle on just how much empty space we’re dealing with. Our Sun lives about two thirds of the way out from the center of our galaxy, so while we’re certainly not in the densest part of a galaxy, we’re by no means in a particularly vacant neighborhood either. The nearest stars to us, Alpha Centauri and Proxima Centauri, are 4 light years away. And looking at the diagram, you can see that that 4 light year distance is about as closely packed as the stars get in our neck of the galactic woods.

Now, Alpha Centauri raises an interesting point – Alpha Centauri is actually two stars. This is not uncommon in a galaxy. The two stars orbit each other as a binary system, and those two stars together travel around the galaxy’s core. However, the two stars are really not very close to each other at all. The two stars in Alpha Centauri are typically somewhere between 1 million miles and three million miles apart. That’s enough space to fit at least half our solar system between the two stars. At their narrowest, the two stars are separated by the distance between the Sun and Saturn.

Source: Jillian Scudder, PhD, Forbes – http://www.forbes.com/sites/jillianscudder/2016/10/16/astroquizzical-stars-touching/#6b0e19612184