In our last article on Cartwheel Galaxy facts, we learned about its discovery, location and formation. What we didn’t mention is what really happened to the smaller galaxy that collided with it some 200 million years ago. We also didn’t mention why Cartwheel Galaxy is one of the strongest X-Ray sources in deep space. We will learn about those Cartwheel Galaxy fun facts in this article. It is going to be small and quick! Let’s begin…
Cartwheel Galaxy Fun Facts: 1-5 | What happened to the small galaxy?
1. The smaller galaxy which collided with the Cartwheel Galaxy (when it is originally a spiral galaxy) went past to the other side straight through the Cartwheel Galaxy.
2. Scientists say that one of the two smaller galaxies that we see nearby is the intruder galaxy that passed through after a nearly head-on collision.
3. Most likely, the smaller galaxy which passed through Cartwheel Galaxy is the smaller bluer galaxy because it appears disrupted.
4. Not just disrupted, that galaxy also have young blue stars and has evidence of formation of new stars, making it a strong contender for being the intruder galaxy.
5. However, it doesn’t mean that the other one which is not bluish and is actually yellowish may be the intruder. The possible hypothesis is that when it passed through the Cartwheel galaxy, the intruder was stripped off it gas and hence, no new star forming activity.
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Cartwheel Galaxy Fun Facts: 6-10 | Why is the Cartwheel Galaxy an X-Ray source?
6. The Cartwheel Galaxy is a starburst galaxy. It is so called because new stars are being formed in great numbers.
7. Starburst galaxies usually have enormously large new stars that are extremely luminous. However, when these stars come to an end of their life, they explode in what we called supernova explosion.
9. Usually these black holes and neutron stars have companion stars. However, because the black holes and neutron stars have immense gravity, they rip off matter from the companion stars.
10. The immense gravity of the black holes and the neutron stars lead to creation of accretion discs around them.
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