Remove

1. ALTAIR
2. Hubble Space Teles …
3. 2005

What

1. Sun (2)
2. Earth (2)
3. Canis Major (2)
4. SIRIUS (2)

Where

1. Arizona (2)
2. Washington, D.C … (2)
3. Germany (2)

When

1. 2004 (2)
2. 2003 (2)
3. February 2004 (2)
4. October 2003 (2)