Earth's Climate Long Ago
How Do We Know What Earth's Climate Was Like Long Ago_
Clues about the past climate are buried in sediments at the bottom of the oceans and lakes, locked away in coral reefs, frozen in glaciers and ice caps, and preserved in the rings of treesTo extend those records, paleoclimatologists look for clues in Earth's natural environmental records
For example, scientists can study what Earth's climate was like hundreds of years ago by studying the insides of trees that have been alive since then. But if scientists want to know what Earth's climate was like hundreds of thousands to millions of years ago, they study sediment cores and ice cores.
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A Future in Orbit
A Future in Orbit- will potentially involve expedition and the other planets and settlements on the moon as well as establishing mining and fueling outposts, particularly in the asteroid belt. Physical exploration outside the solar System will be robotic for the foreseeable future.
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Venus Called Earth’s Evil Twin
Why is Venus Called Earth’s Evil Twin_
The two planets actually have a lot in common, but somewhere along the way Venus and Earth took two very different paths. NASA Director of Planetary Science, Dr. Lori Glaze, explains how Venus became a hot, hellish, and unforgiving place.
Venus is too hot for liquid water to exist, with surface temperatures as high as 460 degrees Celsius (860 degrees Fahrenheit). That heat comes from the greenhouse effect caused by the atmosphere of Venus, which is so thick that it creates crushing pressure at the planet's surface.
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Polar Ice Melting 🥺
Is Polar Ice Melting_
Human activities are at the root of this phenomenon. Specifically, since the industrial revolution, carbon dioxide and other greenhouse gas emissions have raised temperatures, even higher in the poles, and as a result, glaciers are rapidly melting, calving off into the sea and retreating on land
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International Space Station
International Space Station_ Off the Earth, for the Earth, and Beyond.
The International Space Station maintains an orbit approximately 250 miles (400 kilometers) above sea level, while the Hubble Space Telescope operates at an altitude of about 340 miles (550 kilometers).
This layer of Earth's atmosphere is about 319 miles (513 kilometers) thick. That's much thicker than the inner layers of the atmosphere, but not nearly as thick as the exosphere. The thermosphere is home to the International Space Station as it orbits Earth. This is also where you'll find low Earth orbit satellites
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Gravity and Radio Waves to Study Planets and Moons
How NASA Uses Gravity and Radio Waves to Study Planets and Moons
A spacecraft uses radio antennas to communicate with the deep space Network on Earth which in turn transmits radio signals back to the spacecraft. every spacecraft travels in a predetermined path emitting radio signals as it orbits around its Target scientists. Messages travel through space as radio waves, just like the radio waves that you receive with a car radio. Each spacecraft has a transmitter and a receiver for radio waves as well as a way of interpreting the information received and acting on it.
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Venus So Hot_
Why is Venus So Hot_
Venus' thick atmosphere traps heat creating a runaway greenhouse effect – making it the hottest planet in our solar system with surface temperatures hot enough to melt lead. The greenhouse effect makes Venus roughly 700°F (390°C) hotter than it would be without a greenhouse effect.
It's believed that Venus may have been a temperate planet hosting liquid water for 2 to 3 billion years before a massive resurfacing event about 700 million years ago triggered a runaway greenhouse effect, which caused the planet's atmosphere to become incredibly dense and hot.
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COVID Affected Climate Change
Has COVID Affected Climate Change_ –
We saw small decreases in emissions of greenhouse gases, like carbon dioxide and methane, but they continued to build up in our atmosphere much like in any other year.
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Landing on Mars
What’s it Like Landing on Mars_
We Asked a NASA Expert
It's an intense, challenging and exciting series of events. NASA's most recent Mars rover, Perseverance, slowed from nearly 13,000 miles an hour to a soft landing on the surface in about seven minutes. It involved a parachute, thrusters and even a sky crane.
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Victor Glover
NASA Astronaut Victor Glover Reflects on Juneteenth
Juneteenth is uh now received a lot of attention but it was something that wasn't widely celebrated so one I'm encouraged to know that it's become something that is gaining National and maybe even Global. attention. but it also is a reminder that you know we we have come a long way but we have a long way to go.
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Weather on Mars
Is there Weather on Mars_
Local Forecast from the Interplanetary Weather Service
Today... High winds will lift some scattered dust storms, otherwise mostly sunny. Dust storms may continue throughout the week, causing eye and skin irritation. South wind becoming East to 30 km/hr.
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Have Humans Ever Visited Mars.
Have Humans Ever Visited Mars_
Not yet, but we've sent rovers, landers, and orbiters to. gather the information we'll need to keep future. astronauts safe, and with NASA Artemis, we're. working on new tech that could one day get humans to
Mars Has a Population of Zero. As you probably guessed, there is no known life on Mars.
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Water on Mars
Is There Water on Mars_
Abundant water ice is also present beneath the permanent carbon dioxide ice cap at the Martian south pole. More than 5 million km3 of ice have been detected at or near the surface of Mars, enough to cover the whole planet to a depth of 35 meters (115 ft). Even more ice might be locked away in the deep subsurface
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Asteroid Hit Earth
When was the last time Asteroid Hit Earth?
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Nasa
Will an Asteroid (small, rocky objects that orbit the Sun) Ever Hit Earth ?
Answer By Nasa Expert.
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Asteroids and Other Near-Earth Objects
What You Need To Know About Asteroids and Other Near-Earth Objects.
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Sea Level Rising
Why is Sea Level Rising_
Sea level along the U.S. coastline is projected to rise, on average, 10 - 12 inches (0.25 - 0.30 meters) in the next 30 years (2020 - 2050), which will be as much as the rise measured over the last 100 years (1920 - 2020).
We Asked a NASA Scientist
We asked NASA Expert
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Asteroid Hit Earth
What if an Asteroid Were Going to Hit Earth_
We Asked a NASA Scientist
We asked NASA Expert
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Glacier Melts
Animation_ How a Glacier Melts
Specifically, since the industrial revolution, carbon dioxide and other greenhouse gas emissions have raised temperatures, even higher in the poles, and as a result, glaciers are rapidly melting, calving off into the sea and retreating on land
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Menu_ Food and Culture in Space
What's on the Menu_ Food and Culture on the Space Station
Food on the ISS is similar to the Shuttle, in that it is individually packaged to allow for exchanges and prevent issues in the micro gravity environment. Due to the limited water supply, an emphasis has been placed on thermostatically foods rather than dehydration methods.
When the Soviet Union's Yuri Gagarin (pictured) became the first human in space, he took along and ate the first meal in space: two servings of pureed meat and one of chocolate sauce.
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Aliens Existence
Do Aliens Exist_ We Asked a NASA Scientist.
Extraterrestrial life has never been discovered. However, that doesn’t mean it doesn’t exist. And at NASA, astrologists like Dr. Lindsay Hays are trying to answer one of the most profound questions ever: Is there life beyond Earth.
We asked NASA Expert
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Earthquakes on Other Planets
Are There Earthquakes on Other Planets
Definitely. But on other worlds, these aren't called earthquakes. They're called moonquakes or marsquakes if they're on the Moon and Mars. We know that these exist because we actually sent seismometers to the Moon and to Mars
_ We Asked a NASA Expert
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Planets names
How Do Planets Get Their Names_
All of the planets, except for Earth, were named after Greek and Roman gods and godesses. Jupiter, Saturn, Mars, Venus and Mercury were given their names thousands of years ago. The other planets were not discovered until much later, after telescopes were invented.
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Rainbows on Mars
Are There Rainbows on Mars
Pluto is shown in a rainbow of colors that distinguish the different regions on the planet. The left side of the planet is mostly blue-green with purple swirls, while the right side ranges from a vibrant yellow-green at the top to a reddish orange toward the bottom."
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About Mars
What You Need to Know About Mars
Mars is sometimes called the Red Planet. It's red because of rusty iron in the ground. Like Earth, Mars has seasons, polar ice caps, volcanoes, canyons, and weather. It has a very thin atmosphere made of carbon dioxide, nitrogen, and argon.
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