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Adi1008 wrote:

asdfqwerzzz2 wrote:

Untitled.png

1. What DSO does the above image represent?
2. What is the object's spectral class
3. What causes the light curve shown above

yolo (Click to Show Hidden Text)

1. 2MASSJ22282889-431026
2. variable T6.5 brown dwarf
3. complex clouds or weather patterns that change with altitude and different layers/patches of gas in storms the size of Earth

Exactly! Your turn.

asdfqwerzzz2 wrote:

Adi1008 wrote:

asdfqwerzzz2 wrote:

Untitled.png

1. What DSO does the above image represent?
2. What is the object's spectral class
3. What causes the light curve shown above

yolo (Click to Show Hidden Text)

1. 2MASSJ22282889-431026
2. variable T6.5 brown dwarf
3. complex clouds or weather patterns that change with altitude and different layers/patches of gas in storms the size of Earth

Exactly! Your turn.

Who predicted 21 cm HI radiation (and in what year)?

Magikarpmaster629 wrote:

I had to look this up, hyperphysics came to the rescue [url]http://hyperphysics.phy-astr.gsu.edu/hbase/quantum/h21.html[/url] (Click to Show Hidden Text)

1944, by H. C. van de Hulst

Correct, your turn

1. What is the name of the center object?
2. When was it discovered, and by who?
3. There is another object in this system that is not visible because it does not emit in visible wavelengths. What is it called, and what (broad category) does it emit in?
4. What star cluster is this object seen in from Earth?
5. What is the name of the object to the right of it, and what kind of object is it?

doge wrote:

let's see (Click to Show Hidden Text)

1. T Tauri
2. 1852, John Russel Hind
3. T Tauri South (?), infrared
4. Hyades
5. Hind's rebula, herbig haro object

I assume you meant Hind's nebula, or Hind's reflection nebula, which is right. Also, it is called T Tauri South (or T Tau S). Your turn.

I can feel the Astronomy hype...

I'll ask another question then:
1.What is the object covered by the blue box? It is around 2.2 parsecs from the sun.
2. Name 3 unique/interesting things about this object?
3. Give an estimate for its surface temperature.

arvind_r wrote:

Answer (Click to Show Hidden Text)

1. WISE 0855-0714
2. Coldest brown dwarf known, least massive brown dwarf known, 4th closest star to the Sun
3. 225-260 K

That's all right, your turn