Are black holes dangerous?
These black holes are dark most of the time, but when their gravity pulls in nearby stars and gas, they flare into intense activity and pump out a huge amount of radiation. Massive black holes are dangerous in two ways. If you get too close, the enormous gravity will suck you in.
Could our Sun become a black hole?
No. Stars like the Sun just aren’t massive enough to become black holes. Instead, in several billion years, the Sun will cast off its outer layers, and its core will form a white dwarf – a dense ball of carbon and oxygen that no longer produces nuclear energy, but that shines because it is very hot.
What is the heaviest natural thing on earth?
The heaviest element that occurs in large quantity is uranium (atomic number 92). You can mine it like gold. Technetium (atomic number 43) does not occur naturally.
What is the hardest thing to find on Earth?
Astatine
Is wood rarer than diamond?
but wood is a complex organic structure and compared to its diamonds is simple. In the whole universe, wood is rarer than diamonds.
Can galaxies die?
Galaxies die when the stars that live in them stop forming. Now, for the first time, astronomers have witnessed this phenomenon in a distant galaxy. Scientists were able to glimpse a galaxy as it ejected almost half of the gas it uses to form stars.
What is a dead galaxy?
Hubble observations of the distant galaxy reveal that it hasn’t made stars for some 10 billion years. MACS 2129-1 is what’s known as a “dead galaxy,” because stars no longer form there.
Why is the Milky Way dying?
“This is the first time we have observed a typical massive star-forming galaxy in the distant Universe about to ‘die’ because of a massive cold gas ejection,” says Annagrazia Puglisi, lead researcher on the new study, from the Durham University, UK, and the Saclay Nuclear Research Centre (CEA-Saclay), France.
How long until the Milky Way dies?
Ultimately, the two galaxies will collide and merge. Normally, the news that the Milky Way and Andromeda are going to collide is not a very headline-causing piece of information, since it is due to take place in about 5 billion years.
What is the oldest star in our galaxy?
Methuselah star