中英文 【磨耳朵】723期 Earth is in a hurry 02:13 中英文 【磨耳朵】724期 Why do we have saliva all the time? 00:36 中英文 【磨耳朵】724期 What do dreams taste like? 00:32 中英文 【磨耳朵】724期 Watch out for ‘Zoe’ 02:15 中英文 【磨耳朵】724期 Time to ‘fly’ 00:...
When Earth and Mars reach their closest point, this is known as opposition. It’s the time that Mars appears as a bright red star of the sky; one of the brightest objects, rivaling the brightness of Venus or Jupiter. There’s no question Mars is bright and close, you can see it with...
The distance to Mars from Earth constantly changes as they orbit the sun. The average distance between Earth and Mars is 140 million miles (225 million km).
According to the Alvarez theory, the extinction of the dinosaurs was catastrophic and extrinsic, meaning it came from outside of the Earth. However, other theories suggest that the mass extinction was intrinsic and gradual. One idea is that volcanoes in what is now India experienced massive erupt...
Still, its geologic patterns resemble a variety of places we're familiar with on Earth, from the ancient, flood-scarred and eroded lands of Washington state to the deserts of Death Valley and permafrost of Antarctica. Of course, that doesn't mean that a manned mission to Mars is akin to ...
They are living on a simulated (模仿的), or make-believe, Mars Base. The project called HI-SEAS is in the charge of Kim Binsted. She says this wild environment is as close to Mars as you can find on Earth. Because it is so high, the land is not warm or rich with plants, like...
“When you first spot Mars rising in the east after sunset, you’ll be startled by how bright it looks,” Diana Hannikainen, Sky & Telescope’s observing editor, said in a statement.“Its pale orange color is unmistakable.” You can even see it with your naked eye if you know where...
So, just how old is Earth? By dating the rocks in Earth's ever-changing crust, as well as the rocks in Earth's neighbors, such as the moon and visiting meteorites, scientists have calculated that Earth is 4.54 billion years old, with an error range of 50 million years. Related: How ...
1A. It's 380, 000 kilometres.B. How great!xi.C. Has a man ever been to the moon?D. I hear scientists have sent a spacecraft to Mars.E. it isn't as near as it looks.A: Look! How bright the moon looks!(1)B:ButA: I hear it is far away from the earth. But I don't...
Some of those NEOs may eventually hit Earth, with effects ranging from a pleasant pretty meteor shower to the extinction of an entire species (sorry, dinosaurs). Even though there are a lot of asteroids out there, space is also mind bogglingly big. So how often do these asteroids actually...