Archives
- November 2024
- October 2024
- September 2024
- August 2024
- April 2024
- March 2024
- February 2024
- January 2024
- May 2023
- April 2023
- March 2023
- February 2023
- January 2023
- May 2022
- April 2022
- March 2022
- February 2022
- January 2022
- May 2021
- April 2021
- March 2021
- February 2021
- January 2021
- April 2020
- March 2020
- February 2020
- January 2020
- May 2019
- April 2019
- March 2019
- February 2019
- January 2019
- May 2018
- April 2018
- March 2018
- February 2018
- January 2018
- July 2017
- May 2017
- April 2017
- March 2017
- February 2017
- January 2017
- May 2016
- April 2016
- March 2016
- February 2016
- January 2016
- April 2015
- March 2015
- February 2015
- January 2015
- April 2014
- March 2014
- February 2014
- January 2014
- May 2013
- April 2013
- March 2013
- February 2013
- January 2013
- April 2012
- March 2012
- February 2012
Currently Used Categories
Tag Cloud
- astro201
- astro2110
- astrobiology
- astronomy
- blog1
- blog2
- blog3
- blog4
- blog5
- blog6
- blog7
- blog8
- blog9
- blog10
- brahe
- Class
- Comets
- Copernicus
- earth
- Europa
- extremophiles
- galilei
- galileo
- gravity
- history
- HW2
- HW6
- jupiter
- Kepler
- life
- Mars
- me
- Moon
- NASA
- Newton
- planets
- pluto
- saturn
- Solar System
- space
- technology
- telescopes
- tides
- Time
- Uncategorized
Monthly Archives: January 2015
BLOG#2 LOOK AT THE SKY
As now it is winter recently, Orion (actually part of Orion which looks like a large sandglass) (PS: I took a picture of Orion but it was too dim to be seen.) becomes the most visible constellation during nighttime on the sky. Sometimes the tail of Ursa Major is also visible when the sky is … Continue reading BLOG#2 LOOK AT THE SKY → Continue reading
William Herschel believes in ghosts!
picture from: www.redorbit.com One of my favorite moments in the Neil deGrasse Tyson-hosted show Cosmos: A Spacetime Odyssey takes place in the first moments of one of the first few episodes. It “flashes back” to the early 1800’s, showing a cartoon involving the famous astronomer William Herschel and his young son, John, walking along the […] Continue reading
Blog Post #1: What would happen if you threw a baseball at the speed of light?
This web page gives us the answer. Basically, if any object with mass were moving at that speed, especially within our …
Total Solar Eclipse
People have been fascinated with total solar eclipses. Part of that fascination comes from how rare they are. Solar eclipses occur every 18 months on average, but what makes them so rare is that they are visible from limited number of locations on Earth. It ends up being that a particular location would observe a […] Continue reading
Traveling Faster Than The Speed of Light
Can you possibly travel at a speed faster than the speed of light? Scientists think it might be possible even without violating Einstein’s theory that the speed of light is the “galactic speed limit.” Some theoretical models show that in the early stages of the universe, right after the Big Bang, space expanded at a […] Continue reading
Posted in Class, Light, Space Travel
Tagged astro201, blog1, spacetravel, warpdrive
Comments Off on Traveling Faster Than The Speed of Light
Introduction
Hey here, I am Kewei Xu. I am an Electrical Engineering Major with a Computer Science Minor. I I sometimes forget to do assignments like this one. Did you read the previous sentence as “I sometimes” or “I I sometimes”? Continue reading
Planets bigger than Earth beyond Pluto?
Could it be possible that planets larger than the size of Earth lie beyond Pluto? According to researchers, the behavior of far-out celestial bodies far from the sun (such as Sedna and Pluto), seems to suggest so. Such bodies, called “extreme trans-Neptunian objects” (or ETNO’s), should generally have an orbital distance of roughly 150 AU and […] Continue reading
Light Travel Time and Observing Extraterrestrial Life
http://en.wikipedia.org/wiki/Hubble_Space_Telescope#mediaviewer/File:NASA-HS201427a-HubbleUltraDeepField2014-20140603.jpg A topic that has really intrigued me is the speed of light and the time it takes for light to travel. The above image was taken by the Hubble Space telescope of galaxies billions of light years away. Some of these galaxies even extend back in time to only a few hundred million years of […] Continue reading
Posted in Aliens, Light, Observables
Tagged Andromeda, astro201, blog1, extraterrestrial
Comments Off on Light Travel Time and Observing Extraterrestrial Life
The Cosmic Calendar
The universe is a staggering 14 billion years old – most of us can’t comprehend that length of time, so to put things into perspective, one can fit the entire history of the universe into one calendar year. With this “cosmic calendar,” the universe’s lifetime can be more easily understood by you and me. The… Continue reading The Cosmic Calendar Continue reading
Posted in Class, Historical
Tagged astro201, blog1, cosmiccalendar
Comments Off on The Cosmic Calendar
Hubble revisit the “Pillars of Creation”
Hubble has captured a new visible-light image of the famous “Pillars of Creation.” after nearly 20 years later.
Photo:left: NASA/ESA/STScI/J. Hester and P. Scowen (Arizona State University); right: NASA/ESA/The Hubble Heritage Team (STScI/A… Continue reading