Tuesday, February 21, 2012

Space / Astronomy: What's Hot Now: Closeup view of Apollo Spacecraft 012 Command Module after flash fire

Space / Astronomy: What's Hot Now
These articles that had the largest increase in popularity over the last week // via fulltextrssfeed.com
Closeup view of Apollo Spacecraft 012 Command Module after flash fire
Feb 21st 2012, 11:07

From , former Guide

Closeup view of the exterior of Apollo 012 Command Module at Pad 34 showing the effects of the intense heat of the flash fire which killed the prime crew of the Apollo/Saturn 204 mission. Astronauts Virgil I. Grissom, Edward H. White II, and Roger B. Chaffee lost their lives in the accidental fire.

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Space / Astronomy: What's Hot Now: Apollo 1 Mission and Fire Pictures - Apollo 1 Fire

Space / Astronomy: What's Hot Now
These articles that had the largest increase in popularity over the last week // via fulltextrssfeed.com
Apollo 1 Mission and Fire Pictures - Apollo 1 Fire
Feb 21st 2012, 11:07

From , former Guide

Apollo 1 Mission and Fire Pictures - Apollo 1 Fire

Apollo 1 Mission and Fire Pictures - Apollo 1 Fire

NASA Headquarters - GReatest Images of NASA (NASA-HQ-GRIN)

The mission was officially designated Apollo/Saturn 204, but more commonly known as Apollo 1. In this close-up view of the interior of the Command Module shows the effects of the intense heat of the flash fire which killed the prime crew during a routine training exercise are shown. While strapped into their seats inside the Command Module atop the giant Saturn V Moon rocket, a faulty electrical switch created a spark which ignited the pure oxygen environment. The speed and intensity of the fire quickly exhausted the oxygen supply inside the crew cabin. Unable to deploy the hatch due to its cumbersome design and lack of breathable oxygen, the crew lost consciousness and perished. They were: astronauts Virgil I. "Gus" Grissom, (the second American to fly into space) Edward H. White II, (the first American to "walk" in space) and Roger B. Chaffee, (a "rookie" on his first space mission).

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Monday, February 20, 2012

Space / Astronomy: What's Hot Now: Constellations Pictures Gallery

Space / Astronomy: What's Hot Now
These articles that had the largest increase in popularity over the last week // via fulltextrssfeed.com
Constellations Pictures Gallery
Feb 20th 2012, 11:06

Discover more about each of the 88 modern constellations. Find the names, information, and pictures of the 88 constellations.

* Click on an image below for a larger view *

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Space / Astronomy: What's Hot Now: Project Mercury Overview

Space / Astronomy: What's Hot Now
These articles that had the largest increase in popularity over the last week // via fulltextrssfeed.com
Project Mercury Overview
Feb 20th 2012, 11:06

The goals of the Mercury program were fairly simple, even if their accomplishment was not. They were:
  1. To orbit a manned spacecraft around Earth
  2. To investigate man's ability to function in space
  3. To recover both man and spacecraft safely
No one is exactly sure when mankind first dreamed of space travel. Perhaps it was with Johannes Kepler's book "Somnium." Perhaps it was earlier. However, it wasn't until the middle of the 20th cerntury that technology had developed to the point where man could actually transform his ideas into hardware to achieve space flight. Initiated in 1958, completed in 1963, Project Mercury was the United States' first man-in-space program. After setting the above goals for the project, guidelines were put into place that would help insure that the most expedient and safest approach for attainment of the objectives was followed. They were:
  1. Existing technology and off-the-shelf equipment should be used wherever practical.
  2. The simplest and most reliable approach to system design would be followed.
  3. An existing launch vehicle would be employed to place the spacecraft into orbit.
  4. A progressive and logical test program would be conducted.
This led to more detailed requirements for the spacecraft:
  1. The spacecraft must be fitted with a reliable launch-escape system to separate the spacecraft and its crew from the launch vehicle in case of impending failure.
  2. The pilot must be given the capability of manually controlling spacecraft attitude.
  3. The spacecraft must carry a retrorocket system capable of reliably providing the necessary impulse to bring the spacecraft out of orbit.
  4. A zero-lift body utilizing drag braking would be used for reentry.
  5. The spacecraft design must satisfy the requirements for a water landing.
In keeping with the mandate, most of the equipment used was derived from off-the-shelf equipment or through the direct application of existing technology with two exceptions:
  • An automatic blood-pressure measuring system for use in flight.
  • Instruments for sensing the partial pressures of oxygen and carbon dioxide in the oxygen atmosphere of the cabin and suit, respectively.
The decision was made that the military services could provide the pilots for this new endeavor, so from a total of 508 service records screened in January 1959 by Stanley C. White, Robert B. Voas, and William S. Augerson at the military personnel bureaus in Washington, 110 men were found to meet the minimum standards. This list of names included five Marines, 47 Navy men, and 58 Air Force pilots. Although several Army pilots had been screened, none were graduates of a test pilot school. This group of 110 was divided into three groups, but by the completion of round two there were enough volunteers that group three was never called. Through testing, these 69 men were further pared down to 32 and then to 18. Then, by the middle of April the names of America's firt 7 astronauts were known.

Biographies of Original Mercury 7 Astronauts

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Space / Astronomy: What's Hot Now: 51-L Space Shuttle Challenger Crew Remains Transferred

Space / Astronomy: What's Hot Now
These articles that had the largest increase in popularity over the last week // via fulltextrssfeed.com
51-L Space Shuttle Challenger Crew Remains Transferred
Feb 20th 2012, 11:06

From , former Guide

Space Shuttle Challenger Disaster STS-51L Pictures - 51-L Challenger Crew Remains Transferred

Space Shuttle Challenger Disaster STS-51L Pictures - 51-L Challenger Crew Remains Transferred

NASA Headquarters - GReatest Images of NASA (NASA-HQ-GRIN)

The Challenger crewmember remains are being transferred from 7 hearse vehicles to a MAC C-141 transport plane at the Kennedy Space Center's Shuttle Landing Facility for transport to Dover Air Force Base, Delaware. The STS-51L crew consisted of: Mission Specialist, Ellison S. Onizuka, Teacher in Space Participant Sharon Christa McAuliffe, Payload Specialist, Greg Jarvis and Mission Specialist, Judy Resnik. In the front row from left to right: Pilot Mike Smith, Commander, Dick Scobee and Mission Specialist, Ron McNair.

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Space / Astronomy: What's Hot Now: Dr. Beth A. Brown

Space / Astronomy: What's Hot Now
These articles that had the largest increase in popularity over the last week // via fulltextrssfeed.com
Dr. Beth A. Brown
Feb 20th 2012, 11:06

Dr. Beth A. Brown is from Roanoke, VA, where she grew up with her parents, younger brother, and older cousin. She liked science because she was always curious about how something worked and why something existed. She participated in science fairs in elementary school and junior high, but although space fascinated her, she chose projects that had nothing to do with astronomy. She grew up watching Star Trek, Star Wars, and other shows/movies aboutspace.

Beth was a bright student who took AP classes in high school while performing with the marching and concert bands. She started to take a physics class, but dropped it when she felt she wasn't learning anything. She was valedictoarian of her graduating class. She was still fascinated with space and decided she wanted to become an astronaut.

Dr. Brown then attended Howard University in Washington, DC where she began studying physics and a little astronomy, while participating in the "Showtime" marching band. Because of the close proximity, she was able to do a couple of summer internships at the Goddard Space Flight Center, gaining experience in doing research. One of her professors learning of her desire to be an astronaut, made her research about what it takes to become an astronaut and what it is like to be in space. She discovered that her near-sighted vision would hurt her chances of being an astronaut. Dr. Brown also discovered that being in cramped quarters didn't sound that appealing to her. Her love of astronomy continued, however. She graduated Summa Cum Laude from Howard, receiving a BS in Astrophysics in 1991, and remained at there for another year in the physics graduate program. Although she had been more a physics major than an astronomy major, she decided to pursue astronomy as a career.

Leaving Howard university she enrolled in the University of Michigan, entering the doctoral program in the Department of Astronomy. While there, Beth was quite active. She taught several labs, co-created a short course on astronomy, spent time observing at the Kitt Peak National Observatory (in Arizona), presented at several conferences, and worked at a science museum which had a planetarium. She received her MS in Astronomy in 1994, then went on to finish her thesis (on elliptical galaxies). On December 20, 1998 she received her Ph.D., the first African-American woman to obtain a doctorate in astronomy from the Department of Astronomy at the University of Michigan.

Thanks in part to her previous internships, she was able to return to Goddard as a National Academy of Sciences/National Research Council post-doctoral research associate. In that position, she continued her thesis work on X-ray emission from galaxies. When the post-doc position ended, she became an employee of Goddard, where she is an astrophysicist. She works within the center's National Space Science Data Center (NSSDC), which is a part of the Space Science Data Operations Office.

There are three main parts to her assignment at Goddard; data acquisition, research, and outreach. As a data acquisition scientist, she has responsibilities for the astrophysics data that the NSSDC holds. She is the person who acts as a bridge between the NSSDC's astrophysics archive and other science archive research centers. Her research is on the environment of elliptical galaxies, many of which shine brightly in the X-ray region of the electromagnetic spectrum. This means that there is very hot (about 10 million degrees) material in these galaxies. For this work, she uses data from the ROSAT X-ray satellite and the Chandra X-Ray Observatory, which is the most sophisticated X-ray observatory built to date.

She loves to do things involving educational outreach. One of the outreach projects she is working on, with several people, is the Multiwavelength Milky Way project. This is an effort to make data on our home galaxy accessible to educators, students, and the general public. For the project, she works on web pages, and also appear in the Milky Way video.

Dr. Brown says, "I still like science, because I am still curious about how something works and why something exists. Space continues to fascinate me. I love my job because I get to work on several different things, and there's always something new being discovered! I continue to participate in various conferences such as the American Astronomical Society (AAS) meetings and the National Society of Black Physicists (I served for two years as the Administrative Executive Officer for NSBP). I have also been involved with the National Conference of Black Physics Students (NCBPS) for many years. Sometimes (as with any job) things can get frustrating. But I surround myself with supportive friends and family who help me to get through the tough times. And I also maintain a life outside of work, which keeps me balanced."

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Saturday, February 18, 2012

Space / Astronomy: What's Hot Now: ellipse

Space / Astronomy: What's Hot Now
These articles that had the largest increase in popularity over the last week // via fulltextrssfeed.com
ellipse
Feb 18th 2012, 11:06

Definition: ellipse: A flattened circle or oval. That the orbits of the planets are ellipses, not circles, was first discovered by Johannes Kepler based on the careful observations by Tycho Brahe. An ellipse is essentially a circle that has been stretched out of shape. When describing ellipses, the eccentricity defines how "stretched out" it is. In the case of the moon (diagram), when it is closest it is at perigee and when it is farthest from Earth is is at apogee.

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