Astronomy Weekly Newsletter

Astronomy newsletter

Top new questions this week:

Best telescope for the viewing of Nebulae, Stars and Planets

So, I am a 15 year old interested into astronomy. My father used to have a reflector telescope, but was never so serious about it that he could recommend me a good telescope. I am looking to buy a …

star planets telescope newtonian-telescope nebula  
asked by Harry Kitchener 5 votes
answered by Florin Andrei 5 votes

what a lunar eclipse would look like from moon ?

what a lunar eclipse would look like from moon ? Does earth will become complete dark circle?

moon earth sun lunar-eclipse  
asked by Santhosh 4 votes
answered by LocalFluff 4 votes

How did Copernicus get the idea of heliocentric model?

The heliocentric model marked the beginning of modern astronomy. But what were the reasons which led Copernicus to think that the earth orbited the sun. I've read that his model was based on …

fundamental-astronomy history  
asked by Yashbhatt 4 votes
answered by Calc1DropOut 1 vote

Will the UK be able to witness the tetrad in August 2014?

I live in the UK and am aged 15. I have become extremely interested in astronomy, astrophysics, the lot. Basically I have never seen a tetrad and believe this will be my first time - at least …

asked by Harry Kitchener 4 votes
answered by Jeremy 5 votes

What was the age of the universe when the average density was one atmosphere?

How long did it take after the Big Bang for the average density of the universe to reach one Earth atmosphere at sea level? How about the density of water? Is there a chart of densities that relate to …

asked by CJ Dennis 3 votes
answered by Gerald 4 votes

Red Moon a Characteristic of all Total Lunar Eclipses?

I understand that the redness of the moon during the total lunar eclipse last night/this morning (April 14-15 2014) is a reflection of the red light caused in earth's atmosphere due to Rayleigh …

moon lunar-eclipse  
asked by Joshua 3 votes
answered by Florin Andrei 3 votes

Movement of the satellites of the planets . . .

Is the movement of the satellites (moons) of a planet coplanar, like the planets being coplanar around the local Sun?

planets natural-satellites  
asked by user1394 3 votes
answered by HopDavid 1 vote

Greatest hits from previous weeks:

How can we tell that the Milky Way is a spiral galaxy?

From Earth, we can distinguish the type of another galaxy very easily simply by observing the shape, colour, and structure of the galaxy when we image it. But since we are located inside the Milky …

asked by Devgeet Patel 14 votes
answered by MBR 18 votes

How powerful a telescope would allow me to view the astronauts aboard ISS do a space-walk?

This arose from a comment posted against a question elsewhere on the stackexchange How powerful a telescope/binoculars would allow me to view the astronauts aboard the ISS do a space-walk? Aperture? …

amateur-observing telescope  
asked by Everyone 22 votes
answered by TildalWave 22 votes

Can you answer this?

Are there standard algorithms and procedures for creating unique sky maps based on latitude/longitude/date/time?

I am trying to build an astronomy app that will use the user's latitude and longitude, along with the current date and time, to create a 3D view of the celestial sphere as seen based on that data. …

star-gazing algorithm  
asked by John 2 votes
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