The Orion Bar is a diagonal, ridge-like feature of gas and dust in the lower left quadrant of this HUBBLE image of the Orion Nebula. Sculpted by the intense radiation from nearby hot, young stars, the Orion Bar at first glance appears to be shaped like a bar. It is probably prototypical of a photodissociation region, or PDR.
Credits
Science
NASA, ESA, Massimo Robberto (STScI, ESA), Hubble Space Telescope Orion Treasury Project Team
Image Processing
Zolt G. Levay (STScI), Joseph DePasquale (STScI)
| About The Object | |
|---|---|
| Object Name | Orion Nebula |
| Object Description | Emission Nebula |
| R.A. Position | 05h 35m 17.0s |
| Dec. Position | -5° 23' 27.99" |
| Constellation | Orion |
| Distance | The distance to the Orion Nebula is 1,500 light-years (460 parsecs). |
| Dimensions | The image is 7.9 arcminutes (3.4 light-years or 1.1 parsecs) wide. |
| About The Data | |
| Data Description | The Hubble image was created from HST data from proposal and (M. Robberto STScI/ESA). |
| Instrument | HST>ACS/WFC, HST>WFC3/IR |
| Exposure Dates | Oct. 2004 – Apr. 2005 (ACS), and Feb. 2015 – Oct. 2015 (WFC3/IR) |
| Filters | ACS/WFC: F435W (B), F555W (V), and F775W (i) WFC3/IR: F139M |
| About The Image | |
| Color Info | This image is a composite mosaic of many separate exposures made by the ACS and WFC3 instruments on the Hubble Space Telescope using several different filters isolating the light of specific elements or of specific broad wavelength ranges. The color arises by assigning different hues (colors), to each monochromatic image. In this case, the colors are: Blue: F435W (B) Cyan: F555W (V) Yellow: F775W (i) Red: F139M |
| About The Object | |
|---|---|
| Object Name | A name or catalog number that astronomers use to identify an astronomical object. |
| Object Description | The type of astronomical object. |
| R.A. Position | Right ascension – analogous to longitude – is one component of an object's position. |
| Dec. Position | Declination – analogous to latitude – is one component of an object's position. |
| Constellation | One of 88 recognized regions of the celestial sphere in which the object appears. |
| Distance | The physical distance from Earth to the astronomical object. Distances within our solar system are usually measured in Astronomical Units (AU). Distances between stars are usually measured in light-years. Interstellar distances can also be measured in parsecs. |
| Dimensions | The physical size of the object or the apparent angle it subtends on the sky. |
| About The Data | |
| Data Description |
|
| Instrument | The science instrument used to produce the data. |
| Exposure Dates | The date(s) that the telescope made its observations and the total exposure time. |
| Filters | The camera filters that were used in the science observations. |
| About The Image | |
| Image Credit | The primary individuals and institutions responsible for the content. |
| Publication Date | The date and time the release content became public. |
| Color Info | A brief description of the methods used to convert telescope data into the color image being presented. |
| Orientation | The rotation of the image on the sky with respect to the north pole of the celestial sphere. |
