We should see Venus in the night sky this week!


It is well known that Venus is the second planet from the Sun, and it is the brightest natural object in the night sky after the Moon. According to Starry Night Education on Space.com, in this week, Venus’s brightness becomes brighter than any other times because of a combination of circumstances. There are two reasons that Venus is getting brighter. The first reason is that Venus is approaching Earth. Therefore, it is getting larger. The second reason is (it might be similar with first reason…) that because it is approaching to Earth, it is moving away from Sun. According to this article, it says, “Its phase is also narrowing as it moves in front of the sun, which makes it decrease in brightness. So we’ve got two opposing forces in action: Getting closer means getting brighter, and a narrowing crescent means getting fainter. This week the two balance out to make Venus as bright as it can possibly be.”

In this article, there is information about planet’s cloud. It says because its dense atmosphere and proximity to Sun, it causes for an extreme greenhouse effect. Therefore, the surface temperature of Venus is about 860 degrees Fahrenheit.
Also, there will be special phenomenon on June 5. Venus will pass between Earth and the Sun, so it will look like some black dots on Sun. This event is called a transit of Venus. It only happens only twice a century, so if you miss this time, next one will be on 2117.

Hypervelocity Planets.


I posted about black holes last time. On the post, I wrote down that black holes’ gravitational attraction are so strong that even light cannot escape from those. However, recently, hypervelocity planets were discovered by Dartmouth’s Idan Ginsburg and Gary Wegner along with Avi Loeb, chairman of the Harvard astronomy department. They were researching about behavior of hypervelocity stars, which were already a well-known phenomenon.
This article says, “The hypervelocity stars are created when a pair of stars locked in a binary orbit are sucked in to a black hole.
The pair are thrust apart, with one remaining in the black hole while the other is thrown to the edge of its galaxy”. The hypervelocity planets are created by the one star came out from the black hole. These planets are smaller than stars, and they were affected by black holes. As a result, hypervelocity planets can have 4 times faster average movement speed. Therefore, they can move up to 30 million miles per hour.
Many astronomers think that this discovery can help to solve many questions about space, planets, and black holes.

Black hole.


During the class, we have learned about Black hole. What is Black hole? According to this article, Black holes are some of the strangest and most fascinating objects found in outer space. They are objects of extreme density, with such strong gravitational attraction that even light cannot escape from their grasp if it comes near enough. The name “black holes” was used since in 1969, John Archibald Wheeler gave the name. Before John Archibald Wheeler, mostly these were called frozen stars which are dead.

As I mentioned, even light cannot escape from Black holes. Therefore, black holes are invisible, but we can still detect black holes by the radiation. Because when matter is pulled in, sometimes, the area around black holes release strong high-energy light that can be even seen from across universe. Black holes have three layers, outer event horizon, inner event horizon, and singularity.

It sounds like scientists know about black holes well. However, this article mentioned that scientists do not truly understand the workings of black holes because our best physics theories break down when trying to describe them.