One of the key differences between galaxies with super massive black holes is whether or not the black holes are lit up, because they are basically bingeing on a lot of material in its surroundings.
Let's find a new way to think about the entire taxonomy of solar system objects, and not clutch to this concept of 'planet,' which, of course, only ever meant, 'Do you move against the background stars, regardless of what you're made of?'
Fortunately, most things around the supermassive black hole are just going to go around it. They're going to orbit it. They don't actually get sucked in.
I want to launch a globe into space just to mess with the astronauts.
The moon is such a planet, I can’t even stand it. What else is it if it’s not a planet?
The scientific theory I like best is that the rings of Saturn are composed entirely of lost airline luggage.
There are thousands of asteroids whose orbit in the Solar System crosses that of Earth. And we have a little acronym for them - NEOs: near Earth objects. And our biggest goal is to try to catalogue them, so we know in advance if one is going to put us at risk.
Luckily, there are some rocks left over from our earliest days, asteroids formed during our solar system's birth. Occasionally, some of them drop in on Earth, and when they do, they're called meteorites.
We knew about black holes in other ways, and we knew about neutron stars - well, those are the two things that ultimately got seen.
How do you observe something you can't see? This is the basic question of somebody who's interested in finding and studying black holes. Because black holes are objects whose pull of gravity is so intense that nothing can escape it, not even light, so you can't see it directly.
There may be hundreds of small seed planets - or planetesimals - which grow in the disk of matter around a star.
It shouldn't be so difficult to determine what a planet is. When you're watching a science fiction show like 'Star Trek' and they show up at some object in space and turn on the viewfinder, the audience and the people in the show know immediately whether it's a planet or a star or a comet or an asteroid.
Talk about celestial bodies.
Black holes destroy any objects that happen to fall victim to their gravitational pull.
The tail of the comet always points straight away from the sun, in antisolar direction. Sometimes the tail trails behind, but sometimes it's perpendicular, and sometimes it's ahead of the comet like a headlight on a railroad locomotive.
The hazards posed by Near-Earth Asteroids are assessed by Sentry, a computer system developed by the Near-Earth Objects Group at NASA's Jet Propulsion Laboratory in Pasadena, Calif. The software factors together a cosmic rock's coordinates, distance, velocity, and gravitational influences to calculate its trajectory.
Asteroids have hit the Earth millions of times. We can see them as shooting stars every night. When they get bigger, things get complicated. It is only a matter of time until a big one hits us. And since we can do something about it, we should.
So you're sayin that it's easy to send somat up to space, but you don't believe there's a little banana machine?
