D2, D02, D.II, D II or D-2 may refer to:
A star is a luminous spheroid of plasma held together by self-gravity. The nearest star to Earth is the Sun. Many other stars are visible to the naked eye at night; their immense distances from Earth make them appear as fixed points of light. The most prominent stars have been categorised into constellations and asterisms, and many of the brightest stars have proper names. Astronomers have assembled star catalogues that identify the known stars and provide standardized stellar designations. The observable universe contains an estimated 1022 to 1024 stars. Only about 4,000 of these stars are visible to the naked eye—all within the Milky Way galaxy.
A star's life begins with the gravitational collapse of a gaseous nebula of material largely comprising hydrogen, helium, and trace heavier elements. Its total mass mainly determines its evolution and eventual fate. A star shines for most of its active life due to the thermonuclear fusion of hydrogen into helium in its core. This process releases energy that traverses the star's interior and radiates into outer space. At the end of a star's lifetime, fusion ceases and its core becomes a stellar remnant: a white dwarf, a neutron star, or—if it is sufficiently massive—a black hole.
Stellar nucleosynthesis in stars or their remnants creates almost all naturally occurring chemical elements heavier than lithium. Stellar mass loss or supernova explosions return chemically enriched material to the interstellar medium. These elements are then recycled into new stars. Astronomers can determine stellar properties—including mass, age, metallicity (chemical composition), variability, distance, and motion through space—by carrying out observations of a star's apparent brightness, spectrum, and changes in its position in the sky over time.
Stars can form orbital systems with other astronomical objects, as in planetary systems and star systems with two or more stars. When two such stars orbit closely, their gravitational interaction can significantly impact their evolution. Stars can form part of a much larger gravitationally bound structure, such as a star cluster or a galaxy.
by Mike
Looks brilliant when built. Very challenging building the interior especially the mechanicals. Exterior straight forward. Wouldn’t recommend for beginners.
by Pixxi
R2-D2 is my FAVORITE Star Wars character, so I KNEW I had to get him for my collection! This build was so much fun, it actually felt like building a droid!
by George
I bought this set recently on May 4th as R2-D2 is such an iconic character in the saga! The set looks amazing and very detailed, however i personally don’t see it as a play set as it can be flimsy ay times. The build was very fun and interesting however i had to reset a little bit as the instructions were unclear at one point. If you’re a fan of R2 or Star Wars in general then i highly recommend you get this!
by Aoife
Had such a fun time building R2D2. Made some simple mistakes that I eventually fixed and am super happy with how it turned out! Arrived super quick too!