Yes, mostly. When a star reaches the end of its "Main Sequence" and runs out of the main fuel hydrogen, it starts to burn Helium, and swell up to a Red Giant, or a Super Red Giant in some cases. When it runs out of Helium and Hydrogen, it collapses itself under its own force of gravity with no gas pressure to defend against its collapse. As it collapses...
Large stars create Supernova explosions or sometime Black Holes
Medium sized and small stars throw off their outer layers and the core cools to become a white dwarf.
Anyways, the way stars form is from nebula gathering under a force of gravity so essentially new stars form from the nebula that older stars shed off in their death.
There have been no significant changes in the past thousand years. There have been many solar events though, such as a recent Total Solar Eclipse, where the the galaxy aligned. It happens around once ever 300,000 years or so. You have to understand that the Universe has taken around 14 billion years to get to where it is today, changes in thousands of years are very minuscule and gradual.
New stars form in younger galaxies and nebula that have enough cosmic matter to form the foundation for new stars. These galaxies are commonly referred to as star nurseries.New stars form most everywhere, but particularly in dark nebulae
If they're undiscovered, how are we supposed to know?The likelihood that there is an undiscovered planet ... as opposed to an undiscovered minor planet ... in the Solar System is approximately nil.Astronomers estimate that there are as many as 100 billion to 400 billion planets orbiting other stars in our galaxy.
The age of an individual star can vary; they were all made at different times and have different life spans. Stars can range from a few million to a several billion years old. The oldest star yet discovered, HE 1523-0901, is an estimated 13.2 billion years old.
A universe is a area in space that contains many galaxies and a galaxy is a group of stars of 100 billion or more. Finally a solar system is a sun/star that has an orbit (gravitational pull) and has planets or other matter orbiting it.
Our galaxy, the Milky Way, is itself a galaxy, made up of approx. 200 billion stars. There are no other galaxies within our own.
navigational devices named after him; GPS brand Also the Magellanic cloud, a cluster of stars in a nearby galaxy
No, stars form at different times and in different locations throughout the universe. Some stars formed billions of years ago, while others are still forming today in regions like stellar nurseries. The formation of stars depends on factors such as the availability of gas and dust, gravitational collapse, and surrounding conditions.
Yes, it is possible today.====================================There are billions of galaxies, and you haven't mentioned which one you'reinterested in.If you mean the Milky Way galaxy ... the one of which the Sun is a member ...then the task is easily begun without any telescope at all.ALL of the stars you see with your eyes when you stand in your back yardand browse the night-time sky are stars in the Milky Way galaxy.Spotting individual stars in OTHER galaxies does require a telescope.
Any space laboratory is inside our Galaxy. Humans are not yet able to travel beyond our galaxy.
O-type stars are the most massive and hottest types of stars that form relatively recently in the Milky Way galaxy. These stars have short lifespans of a few million years before they burn out, so any O-type stars still observed today are relatively young in astronomical terms.
Racism has not stopped; it is continually becoming more of a problem in our society today.
Up today mendelevium was not identified in stars.
None of them made today.
Yup 50 stars
Constellations were created and identified by ancient civilizations, including the Babylonians, Greeks, and Egyptians. These cultures observed patterns of stars in the night sky and assigned names and stories to them, forming the basis for the constellations we recognize today.
In Astronomy, it is often not possible to answer the question "why". The Milky Way is the name that ancient farmers used to describe the appearance of our galaxy; like a trail of spilled milk in the sky. They knew little about the stars, nothing about galaxies, and described what they saw. Today we use the phrase "Milky Way" to describe our galaxy as seen from within; countless stars off in the direction of the galactic center, which we see all smudged together because there are so many, and so far away.