Skip to main content

Space, the Enigmatic Frontier

A pie graph of the universe's composition.

    When most people think of outer space, they don’t usually imagine space

    The first thing that comes to mind are stars. Tiny white pinpricks of light in the sky that, in reality, are blazing spitfires of roiling gases. We envision bands of them, flung out into the inky blackness, coiled tight into galaxies or let loose in vibrant splashes of nebulae.
Then people may think of comets, bulky intergalactic travelers remembered by their brilliant icy trail. Perhaps the asteroid comes to mind, one amongst millions drifting lethargically in the thick belt that separates the inner planets of our solar system from the outer. We could imagine planets and constellations, nebulae and supernovae, quasars and pulsars!

    Yet the yawning black stretches of nothingness between these extraterrestrials bodies remain overlooked.

    Of course, ‘nothingness’ isn’t quite the correct term. What really fills the blanks between the occasional blimps of planets, galaxies and star clusters is a combination of dark energy and dark matter.

    Dark energy makes up approximately 70% of the universe. Dark matter takes up another 25%. That only leaves around 5% for the stars, comets, planets, continents, cities and people that seems to encompass us one hundred percent of the time.

    Matter composed of protons, neutrons, and electrons—in other words, everything we perceive on a daily basis—is known as baryonic matter. For hundreds of years, humans have studied the composition of the Earth, discovering elements upon elements that steadily defogged the mystery of substance. It’s bewildering that only five percent of the universe could be so densely packed with different elements, while the other ninety-five percent remains so large and undiscovered.
    When gravitational effects in space didn’t match up with the amount of visible matter, scientists began hypothesizing the existence of a ‘missing mass.’ A recent discovery that the universe’s rate of expansion is accelerating instead of slowing spurred the idea of dark energy, some sort of invisible, unidentified energy that helps propel the expansion of space. Likewise, strange gravitational incidences and the fact that the visible matter of a galaxy often doesn’t match the amount of matter detected suggested the presence of unidentified matter.

    If dark matter does exist, as studies suggest, then what is it made of? One of the leading theories today is the existence of Weakly Interacting Massive Particles, aptly abbreviated WIMPs. 
     Before delving into what WIMPs are, it’s pertinent to know what ‘weakly interacting’ means. Weak force is one of the four forces of the universe: gravity, electromagnetic, strong nuclear, and weak nuclear. Weakly-interacting particles have been observed for a while, for example, images of neutrinos. True to their name, weak particles interact so little with other substances that they can pass through incredible amounts of matter without collision. This detachment makes them difficult to detect in comparison to the constantly colliding protons, neutrons, and electrons of baryonic matter.

A neutrino is a type of weakly interacting particle.

     Immediately after the Big Bang, the incredible energy and heat released allowed for the creation and destruction of particles. After the universe cooled, settled, and stopped producing more particles, most of the particles decayed and disappeared. However, weak particles can’t decay entirely. These remnants of particles, as old as the creation of the universe, hypothetically linger and affect matter According to scientists, the existence of a stable, weakly-interacting particle around 100 times the mass of a proton would fit the bill for the amount of dark matter measured.

    Though dark matter and WIMPs are compelling, fairly supported hypotheses, they are still, to some extent, hypotheses.WIMPs could be floating through space right now—or another theory, the axioms, make up dark matter instead. Even broader, dark matter could exist—or the mechanics of gravity need to be reexamined.

    Scientists are searching for confirmation now, in the form of evidence. CDMS, or the Cryogenic Dark Matter Search, is an experiment taking place in Soudan, Minnesota. Using Z-Sensitive Ionization and Phonon (ZIP) detectors, placed underground to minimize the amount of disturbances, the detectors are attempting to pick up nuclear recoils from WIMPs. Though hardly ever colliding with other particles, WIMPs still do crash into other particles. When one does, CDMS is hoping to pick up on it.

    Join the Marin Science Seminar on Wednesday, October 24. Guest speaker Dr. Nader Mirabolfathi, member of the CDMS research team at UC Berkeley, will speak in depth about dark matter and WIMPs, including how they fit into the puzzle of space, and how the CDMS experiment is attempting to uncover them.


Sandra Ning
Post a Comment

Popular posts from this blog

Bacteria, Botulism, and Beauty

--> By Talya Klinger, MSS Intern
What do foodborne illnesses, neck dystonia treatments, and celebrities’ beauty regimens have in common? Clostridium botulinum, baratii, and other species of Clostridium bacteria produce all of the above and more. These seemingly innocuous, rod-shaped bacteria, commonly found in soil and in the intestinal tracts of fish and mammals, produce one of the most deadly biological substances: botulinum toxin, a neurotoxin that intercepts neurotransmitters and paralyzes muscles in the disease known as botulism. Nonetheless, botulinum toxin isn’t all bad: this chemical not only protects the bacteria from intense heat and high acidity, but it makes for an effective treatment for medical conditions as wide-ranging as muscle spasms, chronic migraines, and, yes, wrinkles. 

Clostridium botulinum and similar bacteria can make their way into the human body in a number of ways. Wounds infected with Clostridium botulinum or spores ingested by infants can lead to …

An Interview With Diara Spain, Ph.D

By Rachael Metzger, MSS Intern

Ocean acidification is an issue becoming apparent in the effects on both sea creatures and humans. Diara Spain, the Associate Professor of Biology at Dominican University, came to Marin Science Seminar to talk to us about her studies in marine invertebrates and the damage ocean acidification is causing them. 

To learn more about Diara Spain and what inspired her studies we conducted an interview:

1. How did you get interested in biology? Is there a time, event, 
or person in your life that inspired you to pursue the study? I've always been interested in biology, really science in general. I grew up in rural North Carolina and as a kid it was expected that you'd spend most of your free time outside playing with your friends and pets.  One thing that sparked my interest in marine organisms were the summer vacations at the undeveloped beaches in North Carolina. 
2. Why did you specifically decide to focus on functional morphology, locomotion in echinode…

Invention in Medicine this Wed. 10/26/16

Marin Science Seminar for Teens & Community Presents Invention in Medicine How Medical Devices get Invented and Go to Market with Art Wallace MD PhD of UCSF & VAMC SF
Wednesday, October 26, 2016 7:30 - 8:30 pm Terra Linda High School, Room 207 320 Nova Albion, San Rafael, CA 94903 

Art Wallace started out in experimental surgery and radiology studying imaging of the heart using CT
scanners. He has worked on a number of devices that originally were built for experimental studies that evolved into clinically useful devices including a cardiac output monitor, the off pump CABG, off pump aneurysm surgery, electronic sedation, and a selective coronary vasodialtor. Dr. Wallace will explain his experiences with the inventive process using examples from both device design and drug development. There will be a brief discussion of the importance of intellectual property, patents, venture capital, FDA approval, and business development in completing the invention process. There will …