What is special about Rigel?
What is special about Rigel?
Rigel is a blue supergiant that is the brightest star in the constellation Orion (the Hunter). Due to its measured size and brightness it is expected to end in a supernova one day.
Who named the star Rigel?
Is Rigel a binary star?
Rigel B is itself a spectroscopic binary system, consisting of two main sequence stars that orbit their center of gravity every 9.8 days. The stars both belong to the spectral class B9V; Rigel B is the more massive of the pair, at 2.5 versus 1.9 solar masses.
Is Rigel a red giant?
Rigel is a variable star, thus it is occasionally outshone by Betelgeuse. Contrasting with the orange-red Betelgeuse, Rigel appears as blue-white to the naked eye. Rigel is a massive blue supergiant with a luminosity of around 61.500 up to 363.000 that of the Sun.
Which is the hottest star in the universe?
The Wolf-Rayet star WR 102 is the hottest star known, at 210,000 K.
What is the biggest star in the universe?
The largest known star in the universe is UY Scuti, a hypergiant with a radius around 1,700 times larger than the sun.
Which is the coldest star in the universe?
According to a new study, a star discovered 75 light-years away is no warmer than a freshly brewed cup of coffee. Dubbed CFBDSIR 1458 10b, the star is what’s called a brown dwarf.
What is outside the universe?
Outside the bounds of our universe may lie a “super” universe. Space outside space that extends infinitely into what our little bubble of a universe may expand into forever. Lying hundreds of billions of light years from us could be other island universes much like our own.
Does the universe have an end?
The end result is unknown; a simple estimation would have all the matter and space-time in the universe collapse into a dimensionless singularity back into how the universe started with the Big Bang, but at these scales unknown quantum effects need to be considered (see Quantum gravity).
Are there other universes?
Our universe is but one in an unimaginably massive ocean of universes called the multiverse. If that concept isn’t enough to get your head around, physics describes different kinds of multiverse. The easiest one to comprehend is called the cosmological multiverse.
Who created the universe?
A Belgian priest named Georges Lemaître first suggested the big bang theory in the 1920s, when he theorized that the universe began from a single primordial atom.
Who made earth God?
The narrative is made up of two stories, roughly equivalent to the first two chapters of the Book of Genesis. In the first, Elohim (the Hebrew generic word for God) creates the heavens and the Earth in six days, then rests on, blesses and sanctifies the seventh (i.e. the Biblical Sabbath).
When was the first life on Earth?
3.5 billion years ago
Where and how did life begin?
Others think life began in ponds on land, perhaps geothermal pools like those in Yellowstone. Many other locations have been proposed, such as ice. A minority of scientists argue that life must have begun elsewhere in the universe and been carried to Earth, an idea known as “panspermia”.
What animal has evolved the most?
What animals evolved first?
These clusters of specialized, cooperating cells eventually became the first animals, which DNA evidence suggests evolved around 800 million years ago. Sponges were among the earliest animals.
What animal has never evolved?
What is the oldest land species on Earth?
WASHINGTON (Reuters) – A fossilized millipede-like creature discovered in Scotland may represent the oldest-known land animal, a humble pioneer of terrestrial living 425 million years ago that helped pave the way for the throngs that would eventually inhabit Earth’s dry parts.
What is the oldest mammal species on Earth?
Some confirmed sources estimate bowhead whales to have lived at least to 211 years of age, making them the oldest mammals.
What is the oldest surviving animal?
What is the oldest living thing on Earth?
- The oldest living land animal is a 187-year-old Aldabra giant tortoise named Jonathan.
- If you’re looking for something warm blooded, the oldest known mammal is the bowhead whale, with one individual estimated to be 211 years old.