32 years ago on this day, April 24, 1990, Hubble was launched into Earth orbit, during which time it was about 1.4 Has made millions of observations of our universe.
Physicist Casey Handmer was curious about how much of the sky Hubble had captured and how he had captured all of Hubble's observations in one big image. Draw from the sky. This is a beautiful and almost poetic look at Hubble's global view of the universe.
So how much did Hubble photograph the sky? The answer to this question may surprise you.
Hendmer pondered this question and realized that because Hubble's field of view is 202 arcseconds, it takes about 3.2 million observations to completely cover the sky. Since Hubble has made about 1.4 million observations since its launch in 1990, has the observatory captured almost half of the sky? "Not quite." In fact, they are completely drawn on this map.
But why so little?
According to the artist, there are several reasons. For example, spectroscopy tools do not necessarily form an image. Another reason is that Hubble's field of view is very narrow compared to telescopes designed to study the entire sky.
Another big reason is that Hubble tends to cover certain areas of the sky or astronomical objects. Observe frequently. Why? Because that's what scientists want to see. Some observations take longer than others, and some parts of the sky are more interesting. In Handmer's image, the center curve represents the eclipse, so Hubble's multiple observations of planets, moons, and asteroids in our own solar system appear there.
Two large masses near the bottom left, large and small clouds There are Magellanic that are the two small galaxies of the Milky Way galaxy. Many other masses are other nearby galaxies. The Milky Way disk also appears as a U-shaped curve in the middle, so this graphic shows the best that Hubble does.
He wrote on Twitter: "Some observations take longer than others, and some parts of the sky are more interesting. So what did Hubble see? To produce these images from every fourth of the sky, I did a little coding. You can See the eclipse, the galactic plane, the Magellanic Clouds, and Andromeda. To begin with, and will photograph the entire sky each week.
To create this image, Handmer used the Stroke Query API in the Astropy Library to record data for each observation Hubble made. Has given, received. The code he used is available here.
Handmer said: "Each of the observations retrieved using the API describes the target, but overall we get a picture of what Hubble is looking at. . Hubble is an amazing tool, but it has been in space for almost 32 years and will not last forever. "
" Let's launch a new telescope like this this year. What can we see? Photos: all Hubble observations in one image Credit: Casey Handmer Sources: Universe Today/p>