Astrobiology 50th
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The document discusses various topics related to astrobiology and the search for life in the universe. It provides information about the size of the Milky Way galaxy compared to the solar system and the number of stars and galaxies in the universe. It also lists several NASA resources that encourage students to think and act like scientists, including videos, activities, and topics related to the search for life on other worlds and exoplanets.
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- The planets orbit the sun on elliptical paths and revolve in the same direction counter-clockwise when viewed from above the north pole.
- Planets revolve around the sun at different rates, with inner planets revolving faster, and rotate at different rates, with inner planets rotating slower.
- Prograde motion is counter-clockwise rotation when viewed from above the north pole, while retrograde motion is clockwise.
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The Formation Of Solar System Essay
The document is a student paper on the solar system written for an astronomy class. It provides an overview of the formation of the solar system and details about some of the major components, including the sun and planets. It discusses the types of stars that formed before population I stars and the basic structure of the solar system. The paper also provides some background on the author and due date for the assignment.
Universe-the-Solar-System.pdf
1. Scientists have discovered Kepler-452b, an exoplanet nearly identical to Earth in size and orbit. It orbits a star similar to our Sun and is located 1400 light years away.
2. This discovery suggests that life could exist on other planets and reinforces the probability of finding Earth-like planets in the Milky Way galaxy.
3. Kepler-186f, an Earth-sized exoplanet discovered in the habitable zone of its star, is particularly notable as it is the smallest exoplanet found so far to orbit in the habitable zone where liquid water could exist.
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The document discusses NASA's objectives to search for evidence of ancient life on Mars through ongoing rover missions. It also summarizes a presentation on a potential Mars mission, including discussions with scientists about challenges such as water availability, energy for rockets, bone density loss, and radiation. Biosphere 2 is mentioned as a facility studying closed ecological systems that could be relevant for Mars colonization. The overall feasibility of a Mars mission by 2028 is presented.
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Grade 6PB researched space facts and created a presentation in Microsoft Word and Slideshare about the Milky Way galaxy, space debris, sound in space, animals in space, galaxies, stars, the first launch into space, space shuttles, the moon, women in space, and asteroids. The presentation included interesting facts about each topic and was intended to inform and enjoy readers.
6. the fine tuned universe
This document discusses the fine-tuned universe theory, which argues that the universe appears carefully designed to support life. It outlines several factors that must be precisely tuned for life, such as the organization of matter into atoms and precise mass relationships between subatomic particles. The document also reviews ideas about the origin of the universe, such as the Big Bang theory and biblical creation account. It provides illustrations of astronomical objects and facts about the immense scale of the universe.
Space Research Paper
The defining feature of mankind has been the continual desire to transcend boundaries. We have not looked back since the 1957 launch of Sputnik, sending satellites, mammals, and eventually men and women into space with missions every year after 1957. Currently, the only manned mission in space is the International Space Station, aboard which six astronauts consume more than 8,200 pounds of food per year, all of which comes from Earth at a cost of $400 million per year. For long duration missions beyond low Earth orbit, developing sustainable food sources for astronauts will be crucial.
Discovery Of Decade
NASA discovered Earth's older cousin planet Kepler 452b in 2015, which is 60% larger than Earth and has a similar temperature. The Mars Phoenix lander confirmed the presence of water ice and organic compounds on Mars. Researchers discovered that caves in Indonesia containing the world's oldest art are four times older than previously thought. Scientists mapped the largest known cave, Haiting Hall in China, which is 100 meters wide, 118 meters deep, and almost 200 meters long. NASA's Spitzer Space Telescope discovered seven Earth-sized planets orbiting a dwarf star called TRAPPIST-1 in 2017.
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The document discusses the occupational characteristics of microbiologists. Microbiologists study microorganisms like bacteria, archaea, algae, fungi, protozoa and viruses. On a daily basis, microbiologists treat infections, identify and classify new organisms, and find new uses for existing organisms. They may also work in epidemiology and write research reports. Graduating with a biology degree from the University at Albany provides various career opportunities in fields like research, health, and education, including work as a microbiologist.
FASCINATING FACTS OF SPACE
WE LIVE IN A STRANGE SOLAR SYSTEM
There's a lot to wonder about space. The fact is we don't know all the answers about it. We know it's vast and beautiful, but we're not really sure how vast (or how beautiful, for that matter).
Some of the things we do know, however, are downright mind-boggling. Below, I've collected some of the most amazing facts about space, so when you look up at the stars you can be ever more wowed by what you're looking at.
1. Neutron stars can spin at a rate of 600 rotations per second
Neutron stars are one of the possible evolutionary end-points of high mass stars. They're born in a core-collapse supernova star explosion and subsequently rotate extremely rapidly as a consequence of their physics. Neutron stars can rotate up to 60 times per second after born. Under special circumstances, this rate can increase to more than 600 times per second.
2. Space is completely silent
Sound waves need a medium to travel through. Since there is no atmosphere in the vacuum of space, the realm between stars will always be eerily silent.
That said, worlds with atmospheres and air pressure do allow sound to travel, hence why there's plenty of noise on Earth and likely other planets as well.
3. There is an uncountable number of stars in the known universe
We basically have no idea how many stars there are in the universe. Right now we use our estimate of how many stars there are in our own galaxy, the Milky Way. We then multiply that number by the best guesstimate of the number of galaxies in the universe. After all that math, NASA can only confidently say that say there all zillions of uncountable stars. A zillion is any uncountable amount.
An Australian National University study put their estimate at 70 sextillion. Put another way, that's 70,000 million million million
4. The Apollo astronauts' footprints on the moon will probably stay there for at least 100 million years
Since the moon doesn't have an atmosphere, there's no wind or water to erode or wash away the Apollo astronauts' mark on the moon. That means their footprints, roverprints, spaceship prints, and discarded materials will stay preserved on the moon for a very long time.
They won't stay on there forever, though. The moon still a dynamic environment. It's actually being constantly bombarded with "micrometeorites," which means that erosion is still happening on the moon, just very slowly.
5. 99 percent of our solar system's mass is the sun
Our star, the sun, is so dense that it accounts for a whopping 99 percent of the mass of our entire solar system. That's what allows it to dominate all of the planets gravitationally.
Technically, our sun is a "G-type main-sequence star" which means that every second, it fuses approximately 600 million tons of hydrogen to helium. It also converts about 4 million tons of matter to energy as a byproduct.
When the sun dies, it will become a red giant and envelop the Earth and everything on it. But don't worry: That won't happen for another
Science EARTHWATCH
The document discusses mineral veins found on Mars and how they were formed. Scientists used the Curiosity rover to explore Gale Crater on Mars, where there is evidence that lakes existed 3.6 billion years ago. Analysis of mineral veins in the crater revealed that they formed as sediments from the ancient lakes were buried, heated to 50 degrees Celsius, and evaporated, leaving behind silica and sulfate minerals. The veins provide further evidence that Mars once had evaporating lakes suitable for microbial life.
Recent developments-in-space-exploration-and-travel (5)
The document summarizes several major developments in space exploration from the past year, including Ireland's first space mission called Cumar, Scott Kelly and Mikhail Kornienko's year-long mission aboard the International Space Station, Hubble Telescope turning 25 years old, MESSENGER spacecraft's final images of Mercury before crashing into it, discoveries of potential planets beyond Pluto and water on Mars and Saturn's moon Enceladus, Earth-like exoplanet Kepler-452b found, New Horizons spacecraft's flyby of Pluto and observations of its moons, and Philae lander's touchdown on comet 67P/Churyumov–Gerasimenko as part of the Rosetta mission.
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Presentation1 breakthroughs of earth of space
The document discusses three recent discoveries in space exploration. It describes how astronomers have found evidence of "dark matter" making up half of the universe's missing mass by detecting the brightening of stars caused by dead stars passing in front of them. The document also discusses how Hubble photos revealed the universe may contain many more galaxies than previously estimated, around 50 million galaxies. Finally, it discusses a computer simulation suggesting the early solar system may have originally had five giant planets, with one planet getting ejected during a gravitational disturbance caused by Jupiter's shifting orbit.
Ian Morison
Background
We can search for evidence of past, or even present, life forms within our own solar system, find
evidence of simple life on planets around other stars –- a planet where water could be present has
recently be found –- or even detect an intelligent signal from an alien civilization. The speaker was
a project scientist in the most sensitive search, Project Phoenix, ever undertaken. Sadly, no signals
were detected but a new 10 year search using two of the world’s largest radio telescopes is about
to begin and, during the next decade, a giant radio telescope, the Square Kilometer Array, will have
the sensitivity to detect alien signals from across the galaxy.
Habiatal Zone (outside our solar system)
The document discusses the habitability of planets outside our solar system. It covers topics like the habitable zones around different types of stars where liquid water could exist, methods used to detect exoplanets, and factors that influence a planet's potential habitability such as size, atmosphere, and distance from the host star. It also examines probabilities for life elsewhere in the galaxy based on the Drake Equation and considers challenges around detecting and communicating with intelligent civilizations.
Kepler earth size
The Kepler space telescope has discovered the first two Earth-sized exoplanets orbiting a star called Kepler-20. The smaller planet, Kepler-20e, is around the size of Venus and orbits every 6 days. The larger planet, Kepler-20f, is around the size of Earth and orbits every 20 days. These discoveries mark an important milestone for finding planets similar in size to Earth outside our solar system.
Black holes ITAES
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life in the universe
The document discusses the search for life in the universe. It defines life as having the ability to react to the environment, grow through nourishment, reproduce, and evolve. Early Earth conditions allowed amino acids to form, and the first single-celled organisms appeared 3.5 billion years ago. Other potential places for life in our solar system include Mars, Europa, and Titan. Estimates of intelligent civilizations in the galaxy are uncertain but suggest the nearest one may be hundreds of lightyears away. Earth has sent probes into space carrying information about us and leaks radio signals, while searching radio frequencies like the "water hole" for messages.
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Astrobiology 50th
- 1. Becky Jaramillo National Institute of Aerospace
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