Posts tagged Astronomy
Posts tagged Astronomy
This blog’s Hubble week now moves into gifs from Hubble photos. Here is Saturn and its southern aurora. Photographed 8 January 2004 in the UV, proposal ID 10083.
Saturn has aurora!?! Of course it does; silly me.
Planetary Society | Emily Lakdawalla
The Solar System contains 18 or 19 natural satellites of planets that are large enough for self-gravity to make them round. (Why the uncertain number? Neptune’s moon Proteus is on the edge.) They are shown here to scale with each other. Two of them are larger than Mercury; seven are larger than Pluto and Eris. If they were not orbiting planets, many of these worlds would be called “planets,” and scientists who study them are called “planetary scientists.”
Things that are pretty: the solar system’s moons.
Solar System Travel Posters
It never hurts to compare the sizes of astronomical objects to get a sense of perspective. Or awe. Mostly awe.
An even cooler post would be how these epic names are chosen. For example, did you know that:
In ancient Egypt, Rigel’s name was Seba-en-Sah Sb3-n-S3ḥ, which means toe star or foot star.
Astronomy class was so worth it, last semester.
This animation is relevant to today’s APOD: http://apod.nasa.gov/apod/ap120225.html
Billions of years just passed before your eyes
Our neighboring galaxy Andromeda (M31) shows evidence of being a past cannibal and is 3 times the size of the Milky Way. We are predicted to be “consumed” within the next 7 billion years. “It would be a beautiful night sky, it will be quite spectacular.” -Author/Astrophysicist Mark Irwin
I read somewhere that in 2-3 billion years you’d be able to see andromeda from earth and it would be larger than the moon in the sky. That’d be a stunning sight.
I seriously just finished watching a documentary about this on netflix!!!
Submitted by youalwayssavemefrommyself
Saw a beautiful near-full moon on the way home tonight. Love the night sky.
Chocolate truffles representing the planets.
Available for order here.
Description from io9: “It’s the perfect way to get to know the solar system — with your mouth. Japanese chocolatier L’Eclat is offering this collection of planet truffles, painted beautifully and flavored in the ways you always imagined.”
Credit: Adrian Mann
Future starships may be constructed in Earth orbit using a ring-type construction facility, which could have hotel rooms where guests could observe the construction.
In the Shadow of Saturn
This is my desktop background.
My first time seriously thinking about this was when I read Timothy Ferris’ Coming of Age in the Milky Way. Blew my mind. It was a mystical experience.
Our significance in the Universe.
Any time I start feeling angry or upset over something, I think about this and how the span of my life in this universe is just way too short to be worrying myself half to death over anything.
This is one of the reasons I love science. It’s exciting to see and think about these things and what they could mean.
Relative Sizes of Stars and Planets
—1. Mercury, Mars, Venus, Earth
—2. Earth, Neptune, Uranus, Saturn, Jupiter
—3. Jupiter, Wolf 359, Sol, Sirius
—4. Sirius, Alderamin, Maia, Kraz
—5. Kraz, Arcturus, Canopus, Rigel
—6. Rigel, Sadir, Pistol star, Mira
—7. Mira, x Carinae, Mu Cephei, VY Canis Majoris
“Science is the best tool we have by far, self-correcting, ongoing, applicable to everything. It has two rules. First: There are no sacred truths; all assumptions must be critically examined; arguments from authority are worthless. Second: Whatever is inconsistent with the facts must be discarded or revised. We must understand the Cosmos as it is and not confuse how it is with how we wish it to be.” —Carl Sagan
Copyright: Dave Jarvis
The sun, as seen from mars.
I love this picture.
Click the link. Do it.
Lots of people know the same side of the moon faces the Earth at all times. But we actually get to see a bit more than 50% of the moon because it wobbles slightly during its orbit. NASA made a video presenting the same effect.