Constellations And The Calendar

The Easterbunny Comes to NGC 4725 

At first called “Easterbunny” by its discovery team, officially named Makemake is the second brightest dwarf planet of the Kuiper belt. The icy world appears twice in this astronomical image, based on data taken on June 29 and 30 of the bright spiral galaxy NGC 4725. Makemake is marked by short red lines, its position shifting across a homemade telescope’s field-of-view over two nights along a distant orbit. On those dates nearly coincident with the line-of-sight to the spiral galaxy in the constellation Coma Berenices, Makemake was about 52.5 astronomical units or 7.3 light-hours away. NGC 4725 is over 100,000 light-years across and 41 million light-years distant. Makemake is now known to have at least one moon. NGC 4725 is a famous one-armed spiral galaxy.

Credit: Bob English

Harvard Grad Delivers Powerfully Poetic Speech On Overcoming Injustice

List of Free Science Books

Here’s an alphabetical list of all available free books. Note that many of the links will bring you to an external page, usually with more info about the book and the download links. Also, the links are updated as frequently as possible, however some of them might be broken. Broken links are constantly being fixed. In case you want to report a broken link, or a link that violates copyrights, use the contact form. 

A

A Beginner’s Guide to Mathematica

A Brief Introduction to Particle Physics

A First Course in General Relativity

A New Astronomy

A No-Nonsense Introduction to General Relativity

A Popular History of Astronomy During the Nineteenth Century, Fourth Edition

A Review of General Chemistry

A Simple Guide to Backyard Astronomy

A Text Book for High School Students Studying Physics

A Tour of Triangle Geometry

About Life: Concepts in Modern Biology

Acoustic Emission

Adaptive Control

Advanced Calculus

Advanced Learning

Advanced Mathematics for Engineers

Advanced Microwave Circuits and Systems

Advanced Technologies

Advances in Computer Science and IT

Advances in Evolutionary Algorithms

Advances in Geoscience and Remote Sensing

Advances in Haptics

Advances in Human Computer Interaction

Age of Einstein

Aging by Design

AMPL:  A Modeling Language for Mathematical Programming

An Introduction to Elementary Particles

An Introduction to Higher Mathematics

An Introduction to Many Worlds in Quantum Computation

An Introduction to Mathematical Reasoning

An Introduction to Mathematics

An Introduction to Proofs and the Mathematical Vernacular

An Introduction to Relativistic Quantum Mechanics

Analysis 1 (Tao T)

Analysis 2 (Tao T)

Analytic Functions

Astronomical Discovery

Astronomy for Amateurs

Astronomy Today

Astronomy with an Opera-Glass

Automation and Robotics

B

Basic Algebra, Topology and Differential Calculus

Basic Concepts of Mathematics

Basic Concepts of Thermodynamics

Basic Concepts of Thermodynamics Chapter 1

Basic Ideas in Chemistry

Basic Math: Quick Reference eBook

Basic Mathematics for Astronomy

Basic Physics

Basic Positional Astronomy

Basic Principles of Classical and Statistical Thermodynamics

Basic Principles of Physics

Basics of Physics

Beginner’s Botany

Biochemistry

Biochemistry (practice book)

Biology

Board Notes for Particle Physics

Book of Proof

C

Calculus

Calculus Based Physics

Celestial Navigation, Elementary Astronomy, Piloting

Circuit QED — Lecture Notes

Classical Dynamics

Classical Geometry

Classical Mechanics

Climate Models

Collaborative Statistics

College Algebra

Complex Analysis

Computational Geometry

Computational Introduction to Number Theory and Algebra

Computational Physics with Python

Conceptual Physics

Consistent Quantum Theory

Cook-Book Of Mathematics

College Physics

Crude Oil Emulsions- Composition Stability and Characterization

Curiosities of the Sky

D

Decoherence: Basic Concepts and Their Interpretation

Do We Really Understand Quantum Mechanics?

Differential Equations

Diophantine Analysis

Discover Physics

Dr. Donald Luttermoser’s Physics Notes

Dynamics and Relativity

E

Earthquake Research and Analysis

Earthquake-Resistant Structures – Design, Assessment and Rehabilitation

Einstein for Everyone

Electromagnetic Field Theory

Elementary Mathematical Astronomy

Elementary Linear Algebra

Elementary Particle Physics in a Nutshell

Elementary Particles in Physics

Elements of Astrophysics

Embedded Systems – Theory and Design Methodology

Encyclopaedia of Mathematics

Encyclopedia of Astrophysics

Engineering Mathematics 1

Engineering Mathematics with Tables

Essential Engineering Mathematics

Essential Physics

Exoplanet Observing for Amateurs

Experimental Particle Physics

F

Fields

Foundations of Nonstandard Analysis

Frequently Asked Questions about Calendars

Fundamental Concepts of Mathematics

Fundamentals of Analysis (Chen W.W.L)

Further Mathematical Methods

Fusion Physics

G

General Chemistry

General Relativity

General Relativity

Geometric Asymptotics

Geometry and Group Theory

Geometry and Topology

Geometry Formulas and Facts

Geometry Study Guide

Geometry, Topology and Physics

Geometry, Topology, Localization and Galois Symmetry

Great Astronomers

H

Handbook of Formulae and Physical Constants

High School Mathematics Extensions

Higher Mathematics for Engineers and Physicists

History of Astronomy

Homeomorphisms in Analysis

How to Use Experimental Data to Compute the Probability of Your Theory

I

Intelligent Systems

Intrinsic Geometry of Surfaces

Introduction to Astronomy and Cosmology

Introduction to Cancer Biology

Introduction to Chemistry

Introduction to Cosmology

Introduction to Elementary Particles

Introduction to General Relativity

Introduction To Finite Mathematics

Introduction to Particle Physics Notes

Introduction to PID Controllers

Introduction to Quantum Mechanics with Applications to Chemistry

Introduction to Quantum Noise, Measurement and Amplification

Introduction to Social Network Methods

Introduction to String Field Theory

Introduction to the Time Evolution of Open Quantum Systems

Introduction to Quantum Mechanics

Introductory Computational Physics

Introductory Physics 1

Introductory Physics 2

K

Kinetic Theory

L

Laboratory Manual for Introductory Physics

Laws of Physics

Learn Physics Today

Lecture Notes in Discrete Mathematics

Lecture Notes in Quantum Mechanics

Lecture Notes in Nuclear and Particle Physics

Lecture Notes in Particle Physics

Lecture Notes on General Relativity

Lectures on Astronomy, Astrophysics, and Cosmology

Lectures on Particle Physics

Lectures on Riemann Zeta-Function

Light and Matter

M

Mag 7 Star Atlas Project

Many Particle Physics

Math Alive

Mathematical Analysis I(Zakon E)

Mathematical Biology

Mathematical Methods

Mathematical Methods 1

Mathematical Methods for Physical Sciences

Mathematical Methods of Engineering Analysis

Mathematics, Basic Math and Algebra

Mathematics for Computer Science

Mathematics for Computer Science

Mathematics for Computer Scientists

Mathematics For Engineering Students

Mathematics Formulary

Motion Mountain

Music: A Mathematical Offering

Mysteries of the Sun

N

Natural Disasters

New Frontiers in Graph Theory

Noise Control, Reduction and Cancellation Solutions in Engineering

Nondestructive Testing Methods and New Applications

Nonlinear Optics

Notes on Coarse Geometry

Notes on Elementary Particle Physics

Notes on Quantum Mechanics

O

Observing the Sky from 30S

On Particle Physics

Operating Systems: Three Easy Pieces

P

Particle Physics Course Univ. Cape Town

Particle Physics Lecture Notes

People’s Physics Book

Perspectives in Quantum Physics: Epistemological, Ontological and Pedagogical

Photons, Schmotons

Physics Lectures

Physics Tutorials

Physics Study Guides

Pioneers of Science

Practical Astronomy

Practical Astronomy for Engineers

Preparing for College Physics

Primer Of Celestial Navigation

Principal Component Analysis – Multidisciplinary Applications

Publications of the Astronomical Society of the Pacific Volume 1

Q

Quantum Dissipative Systems

Quantum Field Theory

Quantum Fluctuations

Quantum Information Theory

Quantum Magnetism

Quantum Mechanics

Quantum Mechanics

Quantum Mechanics: A Graduate Course

Quantum Mechanics: An Intermediate Level Course

Quantum Notes

Quantum Physics Notes

Quantum Theory of Many-Particle Systems

Quantum Transients

R

Recreations in Astronomy

Relativistic Quantum Dynamics

Relativity: The Special and General Theory

Review of Basic Mathematics

Riemann Surfaces, Dynamics and Geometry Course Notes

S

Short History of Astronomy

Sintering of Ceramics – New Emerging Techniques

Solitons

Some Basic Principles from Astronomy

Special Relativity

Spherical Astronomy

Star-Gazer’s Hand-Book

Statistical Physics

Street-Fighting Mathematics

String Theory

Structures of Life

Supernova Remnants: The X-ray Perspective

Superspace: One Thousand and One Lessons in Supersymmetry

System of Systems

T

The Astrobiology Primer: An Outline of General Knowledge

The Astronomy and the Bible

The Astronomy of the Bible: An Elementary Commentary on the Astronomical References of Holy Scripture

The Basic Paradoxes of Statistical Classical Physics and Quantum Mechanics

The Beginning and the End

The Beginning and the End of the Universe

The Complete Idiot’s Guide to the Sun

The Convenient Setting of Global Analysis

The Eightfold Way: The Beauty of Klein’s Quartic Curve

The General Theory of Relativity

The Geology of Terrestrial Planets

The Geometry of the Sphere

The Handbook of Essential Mathematics

The Moon: A Full Description and Map of its Principal Physical Features

The Open Agenda

The Origin of Mass in Particle Physics

The Particle Detector Brief Book

The Physics Hypertextbook

The Physics of Quantum Mechanics

The Planet Mars

The Small n Problem in High Energy Physics

The Story of Eclipses

The Story of the Heavens

The Structure of Life

The Wonder Book of Knowledge

The World According to the Hubble Space Telescope

The Zij as-Sanjari of Gregory Chioniades (June 27, 2009)

Three Dimensional Geometry

U

Understanding Physics

Unfolding the Labyrinth

Utility of Quaternions in Physics

Uses of Astronomy

A selection of reads centered around feminism, written by women of color for women of color.

“Feminism: A Movement to End Sexist Oppression” (from Feminist Theory: From Margin to Center)

Feminism Is For Everybody: Passionate Politics

Feminist Class Struggle

“Feminism and Class Politics”, a specific chapter from the book here.

The Oppositional Gaze: Black Female Spectators.

Understanding Patriarchy

Talking Back: Thinking Feminist, Thinking Black

Selling Hot Pussy: Representations of Black Female Sexuality in the Cultural Marketplace.

“Romance: Sweet Love” (from Women’s Voices, Feminist Visions, 4th Ed. By S. Shaw and J. Lee)

Woman, Native, Other: Writing Postcoloniality and Feminism - Trinh T. Minh-Ha

”Lynching, Empire, and Sexuality in Black Feminist Theory“ -Hazel V. Carby

”Transnational Feminist Pedagogy: An Interview with Inderpal Grewal and Caren Kaplan“

”Under Western Eyes: Feminist Scholarship and Colonial Discourses“ by Chandra Talpade Mohanty

”Feminist Problematizations of Rights Language“ by Jasbir Puar and Isabelle Barker

Feminist Genealogies, Colonial Legacies, Democratic Futures by M. Jacqui Alexander & Chandra Talpade Mohanty

”The Subject of Freedom“ by Saba Mahmood

The Spivak Reader

Borderlands/La Frontera by Gloria Anzaldúa

”Colonialism, Nationalism, and Colonialized Women: The Contest in India“ by Partha Chatterjee

”Can the Subaltern Speak?“ Gayatri Spivak

The Politics of the Veil - Joan W. Scott

”Decolonizing Feminism: Challenging Connections between Settler Colonialism and Heteropatriarchy“ by Maile Arvin, Eve Tuck, and Angie Morrill

”Native American Feminism, Sovereignty, and Social Change“ by Andrea Smith

Read on Trascender Magazine

Watch Powerful Spoken Word Poem “Black Joke” By Taylor Steele

In her poem “Black Joke” poet Taylor Steele highlights the most common jokes White people throw at Black people. She perfectly explains how unthoughtful it is of people to say such things and how an intention to come off as funny turns you into a racist. Next time you come up with a witty remark, think twice before letting unwholesome word proceed from your mouth.

Full poem

#BlackLivesMatter

Have you ever seen an octopus run before?

From @sciencefriday:

Crawling, swimming, squeezing, jetting—the range of movement available to an octopus is impressive. Yet some species occasionally choose to stand up on two arms and “run” backwards. Chrissy Huffard, a Senior Researcher at the Monterey Bay Aquarium Research Institute, explains the pros and cons of this seemingly silly behavior and why an octopus might find looking foolish useful.

Learn why here:

[Some footage courtesy of The Shape of Life]

Source:Women Without Religion

I’m 16 and I’m pregnant. My mother doesn’t believe in abortion. What do I do?

Someone asked us:

I’m 16 and pregnant. I hate to say it but I wasn’t smart when it came to protection. The problem is, my mom doesn’t believe in abortion. What are my options. I’m so scared that I’m going to be forced to have a baby I’m not ready for. I’m 16. I don’t even have a drivers license yet. How am I suppose to raise a baby. My mom is very unsupportive. How am I going to do this?! What are my options. If I do have to have this baby what can I do?? I’m so scared. I feel like my life is falling apart.

I know that’s hard to believe right now, but you’ll get through this. You’re in a tough situation — no doubt about it. But you’re already reaching out for help. That’s a great first step, and we’re here to help you.

When you’re in a situation that feels overwhelming it helps to take things one step at a time. It sounds like the first thing you need to do is talk with someone in person about your options. You seem pretty sure that your mother doesn’t believe in abortion and wouldn’t support you if you wanted to have one. I can’t tell from your message what exactly you want to do — if you want to keep the pregnancy and become a parent, have an abortion, or give the baby for adoption — but if talking with your mother won’t be helpful, talking with the staff at your nearest Planned Parenthood health center will be. First they can talk through your options with you, and then get you started on the right option for you depending on what you decide (prenatal care or abortion).

If you want to have an abortion, you may not need your mother’s permission. That depends somewhat on where you live. Some states don’t require permission from your parents at all. Other states do. But even most of those states have a way for you to have an abortion without a parent or guardian. That process is called judicial bypass: It’s when a judge says it’s okay for you to get an abortion without involving your parents in your decision.

It may sound scary, but the staff at your nearest Planned Parenthood health center can help with that process. So call them and make an appointment.

Once you’ve made your appointment, your second step is to find a way to get there. You said that you don’t have a driver’s license. For that and other practical reasons, you may need to let someone in your life that you trust know what’s going on, someone who can give you a ride. Otherwise, can you walk or take public transportation? Can you take a taxi? The health center staff you speak with on the phone may have some suggestions or directions for getting there.

The rest of the steps you need to take are going to depend on what you decide to do. But remember, the staff at your nearest Planned Parenthood health center will help you every step of the way.

Last piece of advice: don’t delay! If you’re pregnant, regardless of whether you’re going to have an abortion or stay pregnant, it’s important to get started on that path ASAP, to make sure you stay healthy. You can do this!

-Emily at Planned Parenthood